Annual report pursuant to Section 13 and 15(d)

Schedule III Combined Real Estate and Accumulated Depreciation (Detail)

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Schedule III Combined Real Estate and Accumulated Depreciation (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrance $ 12,302      
Initial Cost to Company, Land 781,659      
Initial Cost to Company, Building, Equipment and Improvements 2,992,690      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 624,590      
Gross Amount at Which Carried at Close of Period, Land 794,729      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,604,210      
Gross Amount at Which Carried at Close of Period, Total 4,398,939 $ 4,321,410 $ 4,243,308 $ 2,491,702
Accumulated Depreciation 704,681 $ 624,314 $ 535,704 $ 465,195
Construction in Progress [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 27,193      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 27,193      
Gross Amount at Which Carried at Close of Period, Total $ 27,193      
Date of Construction 2018      
Charleston [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST SC      
Initial Cost to Company, Land $ 416      
Initial Cost to Company, Building, Equipment and Improvements 1,516      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,402      
Gross Amount at Which Carried at Close of Period, Land 416      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,918      
Gross Amount at Which Carried at Close of Period, Total 4,334      
Accumulated Depreciation $ 1,790      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Charleston [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Charleston [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Lakeland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 397      
Initial Cost to Company, Building, Equipment and Improvements 1,424      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,726      
Gross Amount at Which Carried at Close of Period, Land 397      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,150      
Gross Amount at Which Carried at Close of Period, Total 3,547      
Accumulated Depreciation $ 1,456      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Lakeland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Lakeland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Charlotte [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NC      
Initial Cost to Company, Land $ 308      
Initial Cost to Company, Building, Equipment and Improvements 1,102      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,553      
Gross Amount at Which Carried at Close of Period, Land 747      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,216      
Gross Amount at Which Carried at Close of Period, Total 4,963      
Accumulated Depreciation $ 1,474      
Date of Construction 1986      
Date Acquired Jun. 26, 1995      
Charlotte [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Charlotte [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Youngstown [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 239      
Initial Cost to Company, Building, Equipment and Improvements 1,110      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,591      
Gross Amount at Which Carried at Close of Period, Land 239      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,701      
Gross Amount at Which Carried at Close of Period, Total 3,940      
Accumulated Depreciation $ 1,482      
Date of Construction 1980      
Date Acquired Jun. 26, 1995      
Youngstown [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Youngstown [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cleveland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 701      
Initial Cost to Company, Building, Equipment and Improvements 1,659      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,825      
Gross Amount at Which Carried at Close of Period, Land 1,036      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,149      
Gross Amount at Which Carried at Close of Period, Total 6,185      
Accumulated Depreciation $ 1,677      
Date of Construction 1987/15      
Date Acquired Jun. 26, 1995      
Cleveland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cleveland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Pt. St. Lucie [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 395      
Initial Cost to Company, Building, Equipment and Improvements 1,501      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,060      
Gross Amount at Which Carried at Close of Period, Land 779      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,177      
Gross Amount at Which Carried at Close of Period, Total 2,956      
Accumulated Depreciation $ 1,316      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Pt. St. Lucie [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Pt. St. Lucie [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Orlando - Deltona [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 483      
Initial Cost to Company, Building, Equipment and Improvements 1,752      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,388      
Gross Amount at Which Carried at Close of Period, Land 483      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,140      
Gross Amount at Which Carried at Close of Period, Total 4,623      
Accumulated Depreciation $ 1,990      
Date of Construction 1984      
Date Acquired Jun. 26, 1995      
Orlando - Deltona [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Orlando - Deltona [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
NY Metro-Middletown [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NY      
Initial Cost to Company, Land $ 224      
Initial Cost to Company, Building, Equipment and Improvements 808      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,500      
Gross Amount at Which Carried at Close of Period, Land 224      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,308      
Gross Amount at Which Carried at Close of Period, Total 5,532      
Accumulated Depreciation $ 1,130      
Date of Construction 1988/17      
Date Acquired Jun. 26, 1995      
NY Metro-Middletown [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
NY Metro-Middletown [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Buffalo [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NY      
Initial Cost to Company, Land $ 423      
Initial Cost to Company, Building, Equipment and Improvements 1,531      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,876      
Gross Amount at Which Carried at Close of Period, Land 497      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,333      
Gross Amount at Which Carried at Close of Period, Total 5,830      
Accumulated Depreciation $ 2,218      
Date of Construction 1981      
Date Acquired Jun. 26, 1995      
Buffalo [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Buffalo [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Rochester [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NY      
Initial Cost to Company, Land $ 395      
Initial Cost to Company, Building, Equipment and Improvements 1,404      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,432      
Gross Amount at Which Carried at Close of Period, Land 395      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,836      
Gross Amount at Which Carried at Close of Period, Total 5,231      
Accumulated Depreciation $ 812      
Date of Construction 1981      
Date Acquired Jun. 26, 1995      
Rochester [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Rochester [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Jacksonville [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 152      
Initial Cost to Company, Building, Equipment and Improvements 728      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,896      
Gross Amount at Which Carried at Close of Period, Land 687      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,089      
Gross Amount at Which Carried at Close of Period, Total 4,776      
Accumulated Depreciation $ 1,290      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Jacksonville [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Jacksonville [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Columbia [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST SC      
Initial Cost to Company, Land $ 268      
Initial Cost to Company, Building, Equipment and Improvements 1,248      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 807      
Gross Amount at Which Carried at Close of Period, Land 268      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,055      
Gross Amount at Which Carried at Close of Period, Total 2,323      
Accumulated Depreciation $ 1,108      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Columbia [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Columbia [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Boston [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST MA      
Initial Cost to Company, Land $ 363      
Initial Cost to Company, Building, Equipment and Improvements 1,679      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 907      
Gross Amount at Which Carried at Close of Period, Land 363      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,586      
Gross Amount at Which Carried at Close of Period, Total 2,949      
Accumulated Depreciation $ 1,412      
Date of Construction 1980      
Date Acquired Jun. 26, 1995      
Boston [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Boston [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Rochester [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NY      
Initial Cost to Company, Land $ 230      
Initial Cost to Company, Building, Equipment and Improvements 847      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,326      
Gross Amount at Which Carried at Close of Period, Land 234      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,169      
Gross Amount at Which Carried at Close of Period, Total 3,403      
Accumulated Depreciation $ 1,026      
Date of Construction 1980      
Date Acquired Jun. 26, 1995      
Rochester [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Rochester [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Boston [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST MA      
Initial Cost to Company, Land $ 680      
Initial Cost to Company, Building, Equipment and Improvements 1,616      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 913      
Gross Amount at Which Carried at Close of Period, Land 680      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,529      
Gross Amount at Which Carried at Close of Period, Total 3,209      
Accumulated Depreciation $ 1,320      
Date of Construction 1986      
Date Acquired Jun. 26, 1995      
Boston [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Boston [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Savannah [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 463      
Initial Cost to Company, Building, Equipment and Improvements 1,684      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,930      
Gross Amount at Which Carried at Close of Period, Land 1,445      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,632      
Gross Amount at Which Carried at Close of Period, Total 7,077      
Accumulated Depreciation $ 2,589      
Date of Construction 1981      
Date Acquired Jun. 26, 1995      
Savannah [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Savannah [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Greensboro [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NC      
Initial Cost to Company, Land $ 444      
Initial Cost to Company, Building, Equipment and Improvements 1,613      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,492      
Gross Amount at Which Carried at Close of Period, Land 444      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,105      
Gross Amount at Which Carried at Close of Period, Total 5,549      
Accumulated Depreciation $ 1,954      
Date of Construction 1986      
Date Acquired Jun. 26, 1995      
Greensboro [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Greensboro [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Raleigh-Durham [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NC      
Initial Cost to Company, Land $ 649      
Initial Cost to Company, Building, Equipment and Improvements 2,329      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,540      
Gross Amount at Which Carried at Close of Period, Land 649      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,869      
Gross Amount at Which Carried at Close of Period, Total 4,518      
Accumulated Depreciation $ 1,992      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Raleigh-Durham [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Raleigh-Durham [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Hartford-New Haven [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST CT      
Initial Cost to Company, Land $ 387      
Initial Cost to Company, Building, Equipment and Improvements 1,402      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,047      
Gross Amount at Which Carried at Close of Period, Land 387      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,449      
Gross Amount at Which Carried at Close of Period, Total 5,836      
Accumulated Depreciation $ 1,736      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Hartford-New Haven [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Hartford-New Haven [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 844      
Initial Cost to Company, Building, Equipment and Improvements 2,021      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,044      
Gross Amount at Which Carried at Close of Period, Land 844      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,065      
Gross Amount at Which Carried at Close of Period, Total 3,909      
Accumulated Depreciation $ 1,667      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 302      
Initial Cost to Company, Building, Equipment and Improvements 1,103      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 698      
Gross Amount at Which Carried at Close of Period, Land 303      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,800      
Gross Amount at Which Carried at Close of Period, Total 2,103      
Accumulated Depreciation $ 1,000      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Buffalo [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NY      
Initial Cost to Company, Land $ 315      
Initial Cost to Company, Building, Equipment and Improvements 745      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,060      
Gross Amount at Which Carried at Close of Period, Land 517      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,603      
Gross Amount at Which Carried at Close of Period, Total 5,120      
Accumulated Depreciation $ 1,558      
Date of Construction 1984      
Date Acquired Jun. 26, 1995      
Buffalo [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Buffalo [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Raleigh-Durham [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NC      
Initial Cost to Company, Land $ 321      
Initial Cost to Company, Building, Equipment and Improvements 1,150      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,526      
Gross Amount at Which Carried at Close of Period, Land 321      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,676      
Gross Amount at Which Carried at Close of Period, Total 4,997      
Accumulated Depreciation $ 1,236      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Raleigh-Durham [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Raleigh-Durham [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Columbia [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST SC      
Initial Cost to Company, Land $ 361      
Initial Cost to Company, Building, Equipment and Improvements 1,331      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 993      
Gross Amount at Which Carried at Close of Period, Land 374      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,311      
Gross Amount at Which Carried at Close of Period, Total 2,685      
Accumulated Depreciation $ 1,258      
Date of Construction 1987      
Date Acquired Jun. 26, 1995      
Columbia [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Columbia [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Columbia [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST SC      
Initial Cost to Company, Land $ 189      
Initial Cost to Company, Building, Equipment and Improvements 719      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,219      
Gross Amount at Which Carried at Close of Period, Land 189      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,938      
Gross Amount at Which Carried at Close of Period, Total 2,127      
Accumulated Depreciation $ 1,446      
Date of Construction 1989      
Date Acquired Jun. 26, 1995      
Columbia [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Columbia [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Columbia [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST SC      
Initial Cost to Company, Land $ 488      
Initial Cost to Company, Building, Equipment and Improvements 1,188      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,126      
Gross Amount at Which Carried at Close of Period, Land 488      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,314      
Gross Amount at Which Carried at Close of Period, Total 3,802      
Accumulated Depreciation $ 1,319      
Date of Construction 1986      
Date Acquired Jun. 26, 1995      
Columbia [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Columbia [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 430      
Initial Cost to Company, Building, Equipment and Improvements 1,579      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,349      
Gross Amount at Which Carried at Close of Period, Land 602      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,756      
Gross Amount at Which Carried at Close of Period, Total 4,358      
Accumulated Depreciation $ 1,710      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Orlando [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 513      
Initial Cost to Company, Building, Equipment and Improvements 1,930      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 914      
Gross Amount at Which Carried at Close of Period, Land 513      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,844      
Gross Amount at Which Carried at Close of Period, Total 3,357      
Accumulated Depreciation $ 1,611      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Orlando [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Orlando [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Sharon [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST PA      
Initial Cost to Company, Land $ 194      
Initial Cost to Company, Building, Equipment and Improvements 912      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 596      
Gross Amount at Which Carried at Close of Period, Land 194      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,508      
Gross Amount at Which Carried at Close of Period, Total 1,702      
Accumulated Depreciation $ 859      
Date of Construction 1975      
Date Acquired Jun. 26, 1995      
Sharon [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Sharon [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Ft. Lauderdale [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 1,503      
Initial Cost to Company, Building, Equipment and Improvements 3,619      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,476      
Gross Amount at Which Carried at Close of Period, Land 1,503      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,095      
Gross Amount at Which Carried at Close of Period, Total 6,598      
Accumulated Depreciation $ 2,523      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Ft. Lauderdale [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Ft. Lauderdale [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
West Palm [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 398      
Initial Cost to Company, Building, Equipment and Improvements 1,035      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 509      
Gross Amount at Which Carried at Close of Period, Land 398      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,544      
Gross Amount at Which Carried at Close of Period, Total 1,942      
Accumulated Depreciation $ 914      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
West Palm [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
West Palm [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 423      
Initial Cost to Company, Building, Equipment and Improvements 1,015      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,383      
Gross Amount at Which Carried at Close of Period, Land 424      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,397      
Gross Amount at Which Carried at Close of Period, Total 4,821      
Accumulated Depreciation $ 831      
Date of Construction 1989      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 483      
Initial Cost to Company, Building, Equipment and Improvements 1,166      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,291      
Gross Amount at Which Carried at Close of Period, Land 483      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,457      
Gross Amount at Which Carried at Close of Period, Total 2,940      
Accumulated Depreciation $ 1,210      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 308      
Initial Cost to Company, Building, Equipment and Improvements 1,116      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 855      
Gross Amount at Which Carried at Close of Period, Land 308      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,971      
Gross Amount at Which Carried at Close of Period, Total 2,279      
Accumulated Depreciation $ 1,133      
Date of Construction 1986      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 170      
Initial Cost to Company, Building, Equipment and Improvements 786      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 943      
Gross Amount at Which Carried at Close of Period, Land 174      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,725      
Gross Amount at Which Carried at Close of Period, Total 1,899      
Accumulated Depreciation $ 905      
Date of Construction 1981      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 413      
Initial Cost to Company, Building, Equipment and Improvements 999      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 919      
Gross Amount at Which Carried at Close of Period, Land 413      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,918      
Gross Amount at Which Carried at Close of Period, Total 2,331      
Accumulated Depreciation $ 1,127      
Date of Construction 1975      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Baltimore [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST MD      
Initial Cost to Company, Land $ 154      
Initial Cost to Company, Building, Equipment and Improvements 555      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,504      
Gross Amount at Which Carried at Close of Period, Land 306      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,907      
Gross Amount at Which Carried at Close of Period, Total 2,213      
Accumulated Depreciation $ 925      
Date of Construction 1984      
Date Acquired Jun. 26, 1995      
Baltimore [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Baltimore [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Baltimore [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST MD      
Initial Cost to Company, Land $ 479      
Initial Cost to Company, Building, Equipment and Improvements 1,742      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,043      
Gross Amount at Which Carried at Close of Period, Land 479      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,785      
Gross Amount at Which Carried at Close of Period, Total 5,264      
Accumulated Depreciation $ 2,125      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Baltimore [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Baltimore [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Melbourne [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 883      
Initial Cost to Company, Building, Equipment and Improvements 2,104      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,690      
Gross Amount at Which Carried at Close of Period, Land 883      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,794      
Gross Amount at Which Carried at Close of Period, Total 4,677      
Accumulated Depreciation $ 2,012      
Date of Construction 1986      
Date Acquired Jun. 26, 1995      
Melbourne [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Melbourne [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Newport News [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST VA      
Initial Cost to Company, Land $ 316      
Initial Cost to Company, Building, Equipment and Improvements 1,471      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,090      
Gross Amount at Which Carried at Close of Period, Land 316      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,561      
Gross Amount at Which Carried at Close of Period, Total 2,877      
Accumulated Depreciation $ 1,411      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Newport News [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Newport News [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Pensacola [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 632      
Initial Cost to Company, Building, Equipment and Improvements 2,962      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,847      
Gross Amount at Which Carried at Close of Period, Land 651      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,790      
Gross Amount at Which Carried at Close of Period, Total 5,441      
Accumulated Depreciation $ 2,680      
Date of Construction 1983      
Date Acquired Jun. 26, 1995      
Pensacola [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Pensacola [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Hartford [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST CT      
Initial Cost to Company, Land $ 715      
Initial Cost to Company, Building, Equipment and Improvements 1,695      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,425      
Gross Amount at Which Carried at Close of Period, Land 715      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,120      
Gross Amount at Which Carried at Close of Period, Total 3,835      
Accumulated Depreciation $ 1,629      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Hartford [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Hartford [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 304      
Initial Cost to Company, Building, Equipment and Improvements 1,118      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,936      
Gross Amount at Which Carried at Close of Period, Land 619      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,739      
Gross Amount at Which Carried at Close of Period, Total 4,358      
Accumulated Depreciation $ 1,712      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Alexandria [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST VA      
Initial Cost to Company, Land $ 1,375      
Initial Cost to Company, Building, Equipment and Improvements 3,220      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,935      
Gross Amount at Which Carried at Close of Period, Land 1,376      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 6,154      
Gross Amount at Which Carried at Close of Period, Total 7,530      
Accumulated Depreciation $ 3,252      
Date of Construction 1984      
Date Acquired Jun. 26, 1995      
Alexandria [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Alexandria [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Pensacola Two [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 244      
Initial Cost to Company, Building, Equipment and Improvements 901      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 702      
Gross Amount at Which Carried at Close of Period, Land 244      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,603      
Gross Amount at Which Carried at Close of Period, Total 1,847      
Accumulated Depreciation $ 899      
Date of Construction 1986      
Date Acquired Jun. 26, 1995      
Pensacola Two [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Pensacola Two [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Melbourne Two [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 834      
Initial Cost to Company, Building, Equipment and Improvements 2,066      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,587      
Gross Amount at Which Carried at Close of Period, Land 1,591      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,896      
Gross Amount at Which Carried at Close of Period, Total 6,487      
Accumulated Depreciation $ 1,745      
Date of Construction 1986/15      
Date Acquired Jun. 26, 1995      
Melbourne Two [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Melbourne Two [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Hartford [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST CT      
Initial Cost to Company, Land $ 234      
Initial Cost to Company, Building, Equipment and Improvements 861      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,605      
Gross Amount at Which Carried at Close of Period, Land 612      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,088      
Gross Amount at Which Carried at Close of Period, Total 4,700      
Accumulated Depreciation $ 1,423      
Date of Construction 1992      
Date Acquired Jun. 26, 1995      
Hartford [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Hartford [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 256      
Initial Cost to Company, Building, Equipment and Improvements 1,244      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,362      
Gross Amount at Which Carried at Close of Period, Land 256      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,606      
Gross Amount at Which Carried at Close of Period, Total 3,862      
Accumulated Depreciation $ 1,683      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Atlanta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Norfolk [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST VA      
Initial Cost to Company, Land $ 313      
Initial Cost to Company, Building, Equipment and Improvements 1,462      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,756      
Gross Amount at Which Carried at Close of Period, Land 313      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,218      
Gross Amount at Which Carried at Close of Period, Total 4,531      
Accumulated Depreciation $ 1,685      
Date of Construction 1984      
Date Acquired Jun. 26, 1995      
Norfolk [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Norfolk [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Birmingham [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST AL      
Initial Cost to Company, Land $ 307      
Initial Cost to Company, Building, Equipment and Improvements 1,415      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,943      
Gross Amount at Which Carried at Close of Period, Land 385      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,280      
Gross Amount at Which Carried at Close of Period, Total 3,665      
Accumulated Depreciation $ 1,583      
Date of Construction 1990      
Date Acquired Jun. 26, 1995      
Birmingham [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Birmingham [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Birmingham [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST AL      
Initial Cost to Company, Land $ 730      
Initial Cost to Company, Building, Equipment and Improvements 1,725      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,053      
Gross Amount at Which Carried at Close of Period, Land 730      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,778      
Gross Amount at Which Carried at Close of Period, Total 5,508      
Accumulated Depreciation $ 1,769      
Date of Construction 1990      
Date Acquired Jun. 26, 1995      
Birmingham [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Birmingham [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Montgomery [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST AL      
Initial Cost to Company, Land $ 863      
Initial Cost to Company, Building, Equipment and Improvements 2,041      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,524      
Gross Amount at Which Carried at Close of Period, Land 863      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,565      
Gross Amount at Which Carried at Close of Period, Total 4,428      
Accumulated Depreciation $ 1,794      
Date of Construction 1982      
Date Acquired Jun. 26, 1995      
Montgomery [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Montgomery [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Jacksonville [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 326      
Initial Cost to Company, Building, Equipment and Improvements 1,515      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,443      
Gross Amount at Which Carried at Close of Period, Land 326      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,958      
Gross Amount at Which Carried at Close of Period, Total 3,284      
Accumulated Depreciation $ 1,335      
Date of Construction 1987      
Date Acquired Jun. 26, 1995      
Jacksonville [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Jacksonville [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Pensacola [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 369      
Initial Cost to Company, Building, Equipment and Improvements 1,358      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,442      
Gross Amount at Which Carried at Close of Period, Land 369      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,800      
Gross Amount at Which Carried at Close of Period, Total 5,169      
Accumulated Depreciation $ 2,133      
Date of Construction 1986      
Date Acquired Jun. 26, 1995      
Pensacola [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Pensacola [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Pensacola [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 244      
Initial Cost to Company, Building, Equipment and Improvements 1,128      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,951      
Gross Amount at Which Carried at Close of Period, Land 720      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,603      
Gross Amount at Which Carried at Close of Period, Total 4,323      
Accumulated Depreciation $ 1,381      
Date of Construction 1990      
Date Acquired Jun. 26, 1995      
Pensacola [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Pensacola [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Pensacola [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 226      
Initial Cost to Company, Building, Equipment and Improvements 1,046      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 984      
Gross Amount at Which Carried at Close of Period, Land 226      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,030      
Gross Amount at Which Carried at Close of Period, Total 2,256      
Accumulated Depreciation $ 1,058      
Date of Construction 1990      
Date Acquired Jun. 26, 1995      
Pensacola [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Pensacola [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Tampa [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 1,088      
Initial Cost to Company, Building, Equipment and Improvements 2,597      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,382      
Gross Amount at Which Carried at Close of Period, Land 1,088      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,979      
Gross Amount at Which Carried at Close of Period, Total 5,067      
Accumulated Depreciation $ 2,204      
Date of Construction 1989      
Date Acquired Jun. 26, 1995      
Tampa [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Tampa [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Clearwater [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 526      
Initial Cost to Company, Building, Equipment and Improvements 1,958      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,630      
Gross Amount at Which Carried at Close of Period, Land 526      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,588      
Gross Amount at Which Carried at Close of Period, Total 4,114      
Accumulated Depreciation $ 1,826      
Date of Construction 1985      
Date Acquired Jun. 26, 1995      
Clearwater [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Clearwater [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Clearwater-Largo [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 672      
Initial Cost to Company, Building, Equipment and Improvements 2,439      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,222      
Gross Amount at Which Carried at Close of Period, Land 672      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,661      
Gross Amount at Which Carried at Close of Period, Total 4,333      
Accumulated Depreciation $ 1,918      
Date of Construction 1988      
Date Acquired Jun. 26, 1995      
Clearwater-Largo [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Clearwater-Largo [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Jackson        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST MS      
Initial Cost to Company, Land $ 343      
Initial Cost to Company, Building, Equipment and Improvements 1,580      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,737      
Gross Amount at Which Carried at Close of Period, Land 796      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,864      
Gross Amount at Which Carried at Close of Period, Total 4,660      
Accumulated Depreciation $ 1,661      
Date of Construction 1990      
Date Acquired Jun. 26, 1995      
Jackson | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Jackson | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Norfolk - Virginia Beach [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST VA      
Initial Cost to Company, Land $ 1,142      
Initial Cost to Company, Building, Equipment and Improvements 4,998      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,629      
Gross Amount at Which Carried at Close of Period, Land 1,142      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 8,627      
Gross Amount at Which Carried at Close of Period, Total 9,769      
Accumulated Depreciation $ 3,640      
Date of Construction 1989/93/95/16      
Date Acquired Jun. 26, 1995      
Norfolk - Virginia Beach [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Norfolk - Virginia Beach [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Richmond [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST VA      
Initial Cost to Company, Land $ 443      
Initial Cost to Company, Building, Equipment and Improvements 1,602      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,219      
Gross Amount at Which Carried at Close of Period, Land 443      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,821      
Gross Amount at Which Carried at Close of Period, Total 3,264      
Accumulated Depreciation $ 1,508      
Date of Construction 1987      
Date Acquired Aug. 25, 1995      
Richmond [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Richmond [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Orlando [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 1,161      
Initial Cost to Company, Building, Equipment and Improvements 2,755      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,414      
Gross Amount at Which Carried at Close of Period, Land 1,162      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,168      
Gross Amount at Which Carried at Close of Period, Total 6,330      
Accumulated Depreciation $ 2,427      
Date of Construction 1986/15      
Date Acquired Sep. 29, 1995      
Orlando [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Orlando [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Syracuse [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NY      
Initial Cost to Company, Land $ 470      
Initial Cost to Company, Building, Equipment and Improvements 1,712      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,810      
Gross Amount at Which Carried at Close of Period, Land 472      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,520      
Gross Amount at Which Carried at Close of Period, Total 3,992      
Accumulated Depreciation $ 1,699      
Date of Construction 1987      
Date Acquired Dec. 27, 1995      
Syracuse [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Syracuse [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Ft. Myers [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 205      
Initial Cost to Company, Building, Equipment and Improvements 912      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 607      
Gross Amount at Which Carried at Close of Period, Land 206      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,518      
Gross Amount at Which Carried at Close of Period, Total 1,724      
Accumulated Depreciation $ 877      
Date of Construction 1988      
Date Acquired Dec. 28, 1995      
Ft. Myers [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Ft. Myers [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Ft. Myers [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 412      
Initial Cost to Company, Building, Equipment and Improvements 1,703      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 780      
Gross Amount at Which Carried at Close of Period, Land 412      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,483      
Gross Amount at Which Carried at Close of Period, Total 2,895      
Accumulated Depreciation $ 1,513      
Date of Construction 1991/94      
Date Acquired Dec. 28, 1995      
Ft. Myers [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Ft. Myers [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Harrisburg [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST PA      
Initial Cost to Company, Land $ 360      
Initial Cost to Company, Building, Equipment and Improvements 1,641      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 3,277      
Gross Amount at Which Carried at Close of Period, Land 360      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,918      
Gross Amount at Which Carried at Close of Period, Total 5,278      
Accumulated Depreciation $ 1,119      
Date of Construction 1983      
Date Acquired Dec. 29, 1995      
Harrisburg [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Harrisburg [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Harrisburg [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST PA      
Initial Cost to Company, Land $ 627      
Initial Cost to Company, Building, Equipment and Improvements 2,224      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,535      
Gross Amount at Which Carried at Close of Period, Land 692      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 6,694      
Gross Amount at Which Carried at Close of Period, Total 7,386      
Accumulated Depreciation $ 2,324      
Date of Construction 1985      
Date Acquired Dec. 29, 1995      
Harrisburg [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Harrisburg [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Newport News [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST VA      
Initial Cost to Company, Land $ 442      
Initial Cost to Company, Building, Equipment and Improvements 1,592      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,477      
Gross Amount at Which Carried at Close of Period, Land 442      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,069      
Gross Amount at Which Carried at Close of Period, Total 3,511      
Accumulated Depreciation $ 1,542      
Date of Construction 1988/93      
Date Acquired Jan. 05, 1996      
Newport News [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Newport News [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Jackson [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST MS      
Initial Cost to Company, Land $ 209      
Initial Cost to Company, Building, Equipment and Improvements 964      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,140      
Gross Amount at Which Carried at Close of Period, Land 209      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,104      
Gross Amount at Which Carried at Close of Period, Total 2,313      
Accumulated Depreciation $ 1,070      
Date of Construction 1990      
Date Acquired Jun. 26, 1995      
Jackson [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Jackson [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Montgomery [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST AL      
Initial Cost to Company, Land $ 353      
Initial Cost to Company, Building, Equipment and Improvements 1,299      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,185      
Gross Amount at Which Carried at Close of Period, Land 353      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,484      
Gross Amount at Which Carried at Close of Period, Total 2,837      
Accumulated Depreciation $ 1,150      
Date of Construction 1984      
Date Acquired Jan. 23, 1996      
Montgomery [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Montgomery [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Charleston [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST SC      
Initial Cost to Company, Land $ 237      
Initial Cost to Company, Building, Equipment and Improvements 858      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,067      
Gross Amount at Which Carried at Close of Period, Land 245      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,917      
Gross Amount at Which Carried at Close of Period, Total 2,162      
Accumulated Depreciation $ 998      
Date of Construction 1985      
Date Acquired Mar. 01, 1996      
Charleston [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Charleston [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Tampa [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 766      
Initial Cost to Company, Building, Equipment and Improvements 1,800      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,112      
Gross Amount at Which Carried at Close of Period, Land 766      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,912      
Gross Amount at Which Carried at Close of Period, Total 3,678      
Accumulated Depreciation $ 1,470      
Date of Construction 1985      
Date Acquired Mar. 28, 1996      
Tampa [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Tampa [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Dallas-Ft.Worth [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 442      
Initial Cost to Company, Building, Equipment and Improvements 1,767      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 476      
Gross Amount at Which Carried at Close of Period, Land 442      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,243      
Gross Amount at Which Carried at Close of Period, Total 2,685      
Accumulated Depreciation $ 1,270      
Date of Construction 1987      
Date Acquired Mar. 29, 1996      
Dallas-Ft.Worth [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Dallas-Ft.Worth [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Dallas-Ft.Worth [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 408      
Initial Cost to Company, Building, Equipment and Improvements 1,662      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,340      
Gross Amount at Which Carried at Close of Period, Land 408      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,002      
Gross Amount at Which Carried at Close of Period, Total 3,410      
Accumulated Depreciation $ 1,589      
Date of Construction 1986      
Date Acquired Mar. 29, 1996      
Dallas-Ft.Worth [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Dallas-Ft.Worth [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Dallas-Ft.Worth [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 328      
Initial Cost to Company, Building, Equipment and Improvements 1,324      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,804      
Gross Amount at Which Carried at Close of Period, Land 328      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 6,128      
Gross Amount at Which Carried at Close of Period, Total $ 6,456      
Date of Construction 1986      
Date Acquired Mar. 29, 1996      
Dallas-Ft.Worth [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Dallas-Ft.Worth [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
San Antonio [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 436      
Initial Cost to Company, Building, Equipment and Improvements 1,759      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,552      
Gross Amount at Which Carried at Close of Period, Land 436      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,311      
Gross Amount at Which Carried at Close of Period, Total 3,747      
Accumulated Depreciation $ 1,687      
Date of Construction 1986      
Date Acquired Mar. 29, 1996      
San Antonio [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
San Antonio [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
San Antonio [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 289      
Initial Cost to Company, Building, Equipment and Improvements 1,161      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,491      
Gross Amount at Which Carried at Close of Period, Land 289      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,652      
Gross Amount at Which Carried at Close of Period, Total 3,941      
Accumulated Depreciation $ 552      
Date of Construction 2012      
Date Acquired Mar. 29, 1996      
San Antonio [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
San Antonio [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Mortgage Held By Joint Venture [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST AL      
Initial Cost to Company, Land $ 279      
Initial Cost to Company, Building, Equipment and Improvements 1,014      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,562      
Gross Amount at Which Carried at Close of Period, Land 433      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,422      
Gross Amount at Which Carried at Close of Period, Total 2,855      
Accumulated Depreciation $ 1,130      
Date of Construction 1988      
Date Acquired May 21, 1996      
Mortgage Held By Joint Venture [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Mortgage Held By Joint Venture [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
West Palm [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 345      
Initial Cost to Company, Building, Equipment and Improvements 1,262      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 666      
Gross Amount at Which Carried at Close of Period, Land 345      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,928      
Gross Amount at Which Carried at Close of Period, Total 2,273      
Accumulated Depreciation $ 987      
Date of Construction 1986      
Date Acquired May 29, 1996      
West Palm [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
West Palm [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Ft. Myers [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 229      
Initial Cost to Company, Building, Equipment and Improvements 884      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,858      
Gross Amount at Which Carried at Close of Period, Land 383      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,588      
Gross Amount at Which Carried at Close of Period, Total 3,971      
Accumulated Depreciation $ 1,033      
Date of Construction 1986      
Date Acquired May 29, 1996      
Ft. Myers [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Ft. Myers [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Syracuse [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NY      
Initial Cost to Company, Land $ 481      
Initial Cost to Company, Building, Equipment and Improvements 1,559      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,656      
Gross Amount at Which Carried at Close of Period, Land 671      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,025      
Gross Amount at Which Carried at Close of Period, Total 4,696      
Accumulated Depreciation $ 1,986      
Date of Construction 1983      
Date Acquired Jun. 05, 1996      
Syracuse [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Syracuse [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Lakeland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 359      
Initial Cost to Company, Building, Equipment and Improvements 1,287      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,365      
Gross Amount at Which Carried at Close of Period, Land 359      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,652      
Gross Amount at Which Carried at Close of Period, Total 3,011      
Accumulated Depreciation $ 1,442      
Date of Construction 1988      
Date Acquired Jun. 26, 1996      
Lakeland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Lakeland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Boston - Springfield [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST MA      
Initial Cost to Company, Land $ 251      
Initial Cost to Company, Building, Equipment and Improvements 917      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,555      
Gross Amount at Which Carried at Close of Period, Land 297      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,426      
Gross Amount at Which Carried at Close of Period, Total 3,723      
Accumulated Depreciation $ 1,722      
Date of Construction 1986      
Date Acquired Jun. 28, 1996      
Boston - Springfield [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Boston - Springfield [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Ft. Myers [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 344      
Initial Cost to Company, Building, Equipment and Improvements 1,254      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 710      
Gross Amount at Which Carried at Close of Period, Land 310      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,998      
Gross Amount at Which Carried at Close of Period, Total 2,308      
Accumulated Depreciation $ 1,067      
Date of Construction 1987      
Date Acquired Jun. 28, 1996      
Ft. Myers [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Ft. Myers [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cincinnati [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 557      
Initial Cost to Company, Building, Equipment and Improvements 1,988      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 996      
Gross Amount at Which Carried at Close of Period, Land 688      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,853      
Gross Amount at Which Carried at Close of Period, Total 3,541      
Accumulated Depreciation $ 1,067      
Date of Construction 1988      
Date Acquired Jul. 23, 1996      
Cincinnati [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cincinnati [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Baltimore [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST MD      
Initial Cost to Company, Land $ 777      
Initial Cost to Company, Building, Equipment and Improvements 2,770      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 816      
Gross Amount at Which Carried at Close of Period, Land 777      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,586      
Gross Amount at Which Carried at Close of Period, Total 4,363      
Accumulated Depreciation $ 1,956      
Date of Construction 1990      
Date Acquired Jul. 26, 1996      
Baltimore [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Baltimore [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Jacksonville [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 568      
Initial Cost to Company, Building, Equipment and Improvements 2,028      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,907      
Gross Amount at Which Carried at Close of Period, Land 568      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,935      
Gross Amount at Which Carried at Close of Period, Total 4,503      
Accumulated Depreciation $ 1,905      
Date of Construction 1987      
Date Acquired Aug. 23, 1996      
Jacksonville [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Jacksonville [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Jacksonville [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 436      
Initial Cost to Company, Building, Equipment and Improvements 1,635      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,194      
Gross Amount at Which Carried at Close of Period, Land 436      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,829      
Gross Amount at Which Carried at Close of Period, Total 3,265      
Accumulated Depreciation $ 1,399      
Date of Construction 1985      
Date Acquired Aug. 26, 1996      
Jacksonville [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Jacksonville [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Jacksonville [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 535      
Initial Cost to Company, Building, Equipment and Improvements 2,033      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 649      
Gross Amount at Which Carried at Close of Period, Land 538      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,679      
Gross Amount at Which Carried at Close of Period, Total 3,217      
Accumulated Depreciation $ 1,547      
Date of Construction 1987/92      
Date Acquired Aug. 30, 1996      
Jacksonville [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Jacksonville [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Providence Two [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST RI      
Initial Cost to Company, Land $ 345      
Initial Cost to Company, Building, Equipment and Improvements 1,268      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,116      
Gross Amount at Which Carried at Close of Period, Land 486      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,243      
Gross Amount at Which Carried at Close of Period, Total 3,729      
Accumulated Depreciation $ 1,350      
Date of Construction 1984      
Date Acquired Jun. 26, 1995      
Providence Two [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Providence Two [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Charlotte [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NC      
Initial Cost to Company, Land $ 487      
Initial Cost to Company, Building, Equipment and Improvements 1,754      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 702      
Gross Amount at Which Carried at Close of Period, Land 487      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,456      
Gross Amount at Which Carried at Close of Period, Total 2,943      
Accumulated Depreciation $ 1,313      
Date of Construction 1995      
Date Acquired Sep. 16, 1996      
Charlotte [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Charlotte [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Charlotte [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NC      
Initial Cost to Company, Land $ 315      
Initial Cost to Company, Building, Equipment and Improvements 1,131      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 577      
Gross Amount at Which Carried at Close of Period, Land 315      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,708      
Gross Amount at Which Carried at Close of Period, Total 2,023      
Accumulated Depreciation $ 938      
Date of Construction 1995      
Date Acquired Sep. 16, 1996      
Charlotte [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Charlotte [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Orlando [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 314      
Initial Cost to Company, Building, Equipment and Improvements 1,113      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,449      
Gross Amount at Which Carried at Close of Period, Land 314      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,562      
Gross Amount at Which Carried at Close of Period, Total 2,876      
Accumulated Depreciation $ 1,295      
Date of Construction 1975      
Date Acquired Oct. 30, 1996      
Orlando [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Orlando [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Youngstown [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 600      
Initial Cost to Company, Building, Equipment and Improvements 2,142      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,776      
Gross Amount at Which Carried at Close of Period, Land 693      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,825      
Gross Amount at Which Carried at Close of Period, Total 5,518      
Accumulated Depreciation $ 2,011      
Date of Construction 1988      
Date Acquired Jan. 10, 1997      
Youngstown [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Youngstown [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cleveland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 751      
Initial Cost to Company, Building, Equipment and Improvements 2,676      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,535      
Gross Amount at Which Carried at Close of Period, Land 751      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 7,211      
Gross Amount at Which Carried at Close of Period, Total 7,962      
Accumulated Depreciation $ 2,771      
Date of Construction 1986      
Date Acquired Jan. 10, 1997      
Cleveland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cleveland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
NY Metro-Middletown [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NY      
Initial Cost to Company, Land $ 843      
Initial Cost to Company, Building, Equipment and Improvements 3,394      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,661      
Gross Amount at Which Carried at Close of Period, Land 843      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 8,055      
Gross Amount at Which Carried at Close of Period, Total 8,898      
Accumulated Depreciation $ 2,337      
Date of Construction 1989/95      
Date Acquired Feb. 04, 1998      
NY Metro-Middletown [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
NY Metro-Middletown [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cleveland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 725      
Initial Cost to Company, Building, Equipment and Improvements 2,586      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,586      
Gross Amount at Which Carried at Close of Period, Land 725      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,172      
Gross Amount at Which Carried at Close of Period, Total 5,897      
Accumulated Depreciation $ 2,412      
Date of Construction 1978      
Date Acquired Jan. 10, 1997      
Cleveland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cleveland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cleveland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 637      
Initial Cost to Company, Building, Equipment and Improvements 2,918      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,128      
Gross Amount at Which Carried at Close of Period, Land 701      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,982      
Gross Amount at Which Carried at Close of Period, Total 5,683      
Accumulated Depreciation $ 2,908      
Date of Construction 1979      
Date Acquired Jan. 10, 1997      
Cleveland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cleveland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cleveland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 495      
Initial Cost to Company, Building, Equipment and Improvements 1,781      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,193      
Gross Amount at Which Carried at Close of Period, Land 495      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,974      
Gross Amount at Which Carried at Close of Period, Total 6,469      
Accumulated Depreciation $ 1,737      
Date of Construction 1979/17      
Date Acquired Jan. 10, 1997      
Cleveland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cleveland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cleveland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 761      
Initial Cost to Company, Building, Equipment and Improvements 2,714      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,970      
Gross Amount at Which Carried at Close of Period, Land 761      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,684      
Gross Amount at Which Carried at Close of Period, Total 5,445      
Accumulated Depreciation $ 2,452      
Date of Construction 1977      
Date Acquired Jan. 10, 1997      
Cleveland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cleveland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cleveland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 418      
Initial Cost to Company, Building, Equipment and Improvements 1,921      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,986      
Gross Amount at Which Carried at Close of Period, Land 418      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,907      
Gross Amount at Which Carried at Close of Period, Total 5,325      
Accumulated Depreciation $ 2,192      
Date of Construction 1970      
Date Acquired Jan. 10, 1997      
Cleveland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cleveland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cleveland [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 606      
Initial Cost to Company, Building, Equipment and Improvements 2,164      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,588      
Gross Amount at Which Carried at Close of Period, Land 606      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,752      
Gross Amount at Which Carried at Close of Period, Total 4,358      
Accumulated Depreciation $ 1,792      
Date of Construction 1982      
Date Acquired Jan. 10, 1997      
Cleveland [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cleveland [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
San Antonio [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 346      
Initial Cost to Company, Building, Equipment and Improvements 1,236      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 676      
Gross Amount at Which Carried at Close of Period, Land 346      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,912      
Gross Amount at Which Carried at Close of Period, Total 2,258      
Accumulated Depreciation $ 977      
Date of Construction 1985      
Date Acquired Jan. 30, 1997      
San Antonio [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
San Antonio [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
San Antonio [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 432      
Initial Cost to Company, Building, Equipment and Improvements 1,560      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,168      
Gross Amount at Which Carried at Close of Period, Land 432      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,728      
Gross Amount at Which Carried at Close of Period, Total 4,160      
Accumulated Depreciation $ 1,852      
Date of Construction 1995      
Date Acquired Jan. 30, 1997      
San Antonio [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
San Antonio [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Houston-Beaumont [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 634      
Initial Cost to Company, Building, Equipment and Improvements 2,565      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,659      
Gross Amount at Which Carried at Close of Period, Land 634      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 7,224      
Gross Amount at Which Carried at Close of Period, Total 7,858      
Accumulated Depreciation $ 2,285      
Date of Construction 1993/95/16      
Date Acquired Mar. 26, 1997      
Houston-Beaumont [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Houston-Beaumont [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Houston-Beaumont [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 566      
Initial Cost to Company, Building, Equipment and Improvements 2,279      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 604      
Gross Amount at Which Carried at Close of Period, Land 566      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,883      
Gross Amount at Which Carried at Close of Period, Total 3,449      
Accumulated Depreciation $ 1,506      
Date of Construction 1995      
Date Acquired Mar. 26, 1997      
Houston-Beaumont [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Houston-Beaumont [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Chesapeake [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST VA      
Initial Cost to Company, Land $ 260      
Initial Cost to Company, Building, Equipment and Improvements 1,043      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 4,817      
Gross Amount at Which Carried at Close of Period, Land 260      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,860      
Gross Amount at Which Carried at Close of Period, Total 6,120      
Accumulated Depreciation $ 1,817      
Date of Construction 1988/95      
Date Acquired Mar. 31, 1997      
Chesapeake [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Chesapeake [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Orlando-W 25th St [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 289      
Initial Cost to Company, Building, Equipment and Improvements 1,160      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,580      
Gross Amount at Which Carried at Close of Period, Land 616      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,413      
Gross Amount at Which Carried at Close of Period, Total 4,029      
Accumulated Depreciation $ 1,117      
Date of Construction 1984      
Date Acquired Mar. 31, 1997      
Orlando-W 25th St [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Orlando-W 25th St [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Savannah [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 296      
Initial Cost to Company, Building, Equipment and Improvements 1,196      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 627      
Gross Amount at Which Carried at Close of Period, Land 296      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,823      
Gross Amount at Which Carried at Close of Period, Total 2,119      
Accumulated Depreciation $ 960      
Date of Construction 1988      
Date Acquired May 08, 1997      
Savannah [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Savannah [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Delray One [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 921      
Initial Cost to Company, Building, Equipment and Improvements 3,282      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,105      
Gross Amount at Which Carried at Close of Period, Land 921      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,387      
Gross Amount at Which Carried at Close of Period, Total 5,308      
Accumulated Depreciation $ 2,237      
Date of Construction 1980      
Date Acquired May 21, 1997      
Delray One [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Delray One [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Cleveland-Avon [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST OH      
Initial Cost to Company, Land $ 301      
Initial Cost to Company, Building, Equipment and Improvements 1,214      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,344      
Gross Amount at Which Carried at Close of Period, Land 304      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,555      
Gross Amount at Which Carried at Close of Period, Total 3,859      
Accumulated Depreciation $ 1,631      
Date of Construction 1989      
Date Acquired Jun. 04, 1997      
Cleveland-Avon [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Cleveland-Avon [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta-Alpharetta [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 1,033      
Initial Cost to Company, Building, Equipment and Improvements 3,753      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 827      
Gross Amount at Which Carried at Close of Period, Land 1,033      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,580      
Gross Amount at Which Carried at Close of Period, Total 5,613      
Accumulated Depreciation $ 2,425      
Date of Construction 1994      
Date Acquired Jul. 24, 1997      
Atlanta-Alpharetta [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta-Alpharetta [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Atlanta-Doraville [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST GA      
Initial Cost to Company, Land $ 735      
Initial Cost to Company, Building, Equipment and Improvements 3,429      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 581      
Gross Amount at Which Carried at Close of Period, Land 735      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,010      
Gross Amount at Which Carried at Close of Period, Total 4,745      
Accumulated Depreciation $ 2,148      
Date of Construction 1995      
Date Acquired Aug. 21, 1997      
Atlanta-Doraville [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Atlanta-Doraville [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Greensboro-Hilltop [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NC      
Initial Cost to Company, Land $ 268      
Initial Cost to Company, Building, Equipment and Improvements 1,097      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 941      
Gross Amount at Which Carried at Close of Period, Land 231      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,075      
Gross Amount at Which Carried at Close of Period, Total 2,306      
Accumulated Depreciation $ 927      
Date of Construction 1995      
Date Acquired Sep. 25, 1997      
Greensboro-Hilltop [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Greensboro-Hilltop [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Greensboro-StgCch [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST NC      
Initial Cost to Company, Land $ 89      
Initial Cost to Company, Building, Equipment and Improvements 376      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,975      
Gross Amount at Which Carried at Close of Period, Land 89      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,351      
Gross Amount at Which Carried at Close of Period, Total 2,440      
Accumulated Depreciation $ 1,065      
Date of Construction 1997      
Date Acquired Sep. 25, 1997      
Greensboro-StgCch [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Greensboro-StgCch [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Houston-Beaumont [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 293      
Initial Cost to Company, Building, Equipment and Improvements 1,357      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 712      
Gross Amount at Which Carried at Close of Period, Land 293      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,069      
Gross Amount at Which Carried at Close of Period, Total 2,362      
Accumulated Depreciation $ 1,018      
Date of Construction 1995      
Date Acquired Mar. 26, 1997      
Houston-Beaumont [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Houston-Beaumont [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Baton Rouge-Airline [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST LA      
Initial Cost to Company, Land $ 396      
Initial Cost to Company, Building, Equipment and Improvements 1,831      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,270      
Gross Amount at Which Carried at Close of Period, Land 421      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,076      
Gross Amount at Which Carried at Close of Period, Total 3,497      
Accumulated Depreciation $ 1,511      
Date of Construction 1982      
Date Acquired Oct. 09, 1997      
Baton Rouge-Airline [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Baton Rouge-Airline [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Baton Rouge-Airline2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST LA      
Initial Cost to Company, Land $ 282      
Initial Cost to Company, Building, Equipment and Improvements 1,303      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 633      
Gross Amount at Which Carried at Close of Period, Land 282      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,936      
Gross Amount at Which Carried at Close of Period, Total 2,218      
Accumulated Depreciation $ 980      
Date of Construction 1985      
Date Acquired Nov. 21, 1997      
Baton Rouge-Airline2 [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Baton Rouge-Airline2 [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Harrisburg-Peiffers [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST PA      
Initial Cost to Company, Land $ 635      
Initial Cost to Company, Building, Equipment and Improvements 2,550      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 840      
Gross Amount at Which Carried at Close of Period, Land 637      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,388      
Gross Amount at Which Carried at Close of Period, Total 4,025      
Accumulated Depreciation $ 1,771      
Date of Construction 1984      
Date Acquired Dec. 03, 1997      
Harrisburg-Peiffers [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Harrisburg-Peiffers [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Tampa-E.Hillsborough [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 709      
Initial Cost to Company, Building, Equipment and Improvements 3,235      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,122      
Gross Amount at Which Carried at Close of Period, Land 709      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,357      
Gross Amount at Which Carried at Close of Period, Total 5,066      
Accumulated Depreciation $ 2,252      
Date of Construction 1985      
Date Acquired Feb. 04, 1998      
Tampa-E.Hillsborough [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Tampa-E.Hillsborough [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Dallas Fort Worth [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST TX      
Initial Cost to Company, Land $ 965      
Initial Cost to Company, Building, Equipment and Improvements 3,864      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 1,812      
Gross Amount at Which Carried at Close of Period, Land 943      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,698      
Gross Amount at Which Carried at Close of Period, Total 6,641      
Accumulated Depreciation $ 2,939      
Date of Construction 1977      
Date Acquired Jun. 30, 1997      
Dallas Fort Worth [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Dallas Fort Worth [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Chesapeake-Military [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST VA      
Initial Cost to Company, Land $ 542      
Initial Cost to Company, Building, Equipment and Improvements 2,210      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 570      
Gross Amount at Which Carried at Close of Period, Land 542      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,780      
Gross Amount at Which Carried at Close of Period, Total 3,322      
Accumulated Depreciation $ 1,893      
Date of Construction 1996      
Date Acquired Feb. 05, 1998      
Chesapeake-Military [Member] | Minimum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Chesapeake-Military [Member] | Maximum [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 40 years      
Chesapeake-Volvo [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST VA      
Initial Cost to Company, Land