Annual report pursuant to Section 13 and 15(d)

Schedule III Combined Real Estate and Accumulated Depreciation (Detail)

v3.8.0.1
Schedule III Combined Real Estate and Accumulated Depreciation (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrance $ 12,674      
Initial Cost to Company, Land 773,702      
Initial Cost to Company, Building, Equipment and Improvements 2,974,075      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 573,633      
Gross Amount at Which Carried at Close of Period, Land 786,628      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,534,782      
Gross Amount at Which Carried at Close of Period, Total 4,321,410 $ 4,243,308 $ 2,491,702 $ 2,177,983
Accumulated Depreciation 624,314 $ 535,704 $ 465,195 $ 411,701
Construction in Progress [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Initial Cost to Company, Land 0      
Initial Cost to Company, Building, Equipment and Improvements 0      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 14,383      
Gross Amount at Which Carried at Close of Period, Land 0      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 14,383      
Gross Amount at Which Carried at Close of Period, Total 14,383      
Accumulated Depreciation $ 0      
Date of Construction 2017      
Minimum [Member] | Construction in Progress [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Life on which depreciation in latest income statement is computed 5 years      
Maximum [Member] | Construction in Progress [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 $ 416      
Initial Cost to Company, Building, Equipment and Improvements 1,516      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 2,370      
Gross Amount at Which Carried at Close of Period, Land 416      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,886      
Gross Amount at Which Carried at Close of Period, Total 4,302      
Accumulated Depreciation $ 1,683      
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 1,704      
Gross Amount at Which Carried at Close of Period, Land 397      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,128      
Gross Amount at Which Carried at Close of Period, Total 3,525      
Accumulated Depreciation $ 1,375      
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 3,534      
Gross Amount at Which Carried at Close of Period, Land 747      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,197      
Gross Amount at Which Carried at Close of Period, Total 4,944      
Accumulated Depreciation $ 1,357      
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 2,582      
Gross Amount at Which Carried at Close of Period, Land 239      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,692      
Gross Amount at Which Carried at Close of Period, Total 3,931      
Accumulated Depreciation $ 1,379      
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 $ 1,538      
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 1,054      
Gross Amount at Which Carried at Close of Period, Land 779      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,171      
Gross Amount at Which Carried at Close of Period, Total 2,950      
Accumulated Depreciation $ 1,259      
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 2,324      
Gross Amount at Which Carried at Close of Period, Land 483      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,076      
Gross Amount at Which Carried at Close of Period, Total 4,559      
Accumulated Depreciation $ 1,875      
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 4,442      
Gross Amount at Which Carried at Close of Period, Land 224      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,250      
Gross Amount at Which Carried at Close of Period, Total 5,474      
Accumulated Depreciation $ 996      
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 3,620      
Gross Amount at Which Carried at Close of Period, Land 497      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,077      
Gross Amount at Which Carried at Close of Period, Total 5,574      
Accumulated Depreciation $ 2,080      
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 (141)      
Gross Amount at Which Carried at Close of Period, Land 395      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,263      
Gross Amount at Which Carried at Close of Period, Total 1,658      
Accumulated Depreciation $ 731      
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 3,883      
Gross Amount at Which Carried at Close of Period, Land 687      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,076      
Gross Amount at Which Carried at Close of Period, Total 4,763      
Accumulated Depreciation $ 1,189      
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 775      
Gross Amount at Which Carried at Close of Period, Land 268      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,023      
Gross Amount at Which Carried at Close of Period, Total 2,291      
Accumulated Depreciation $ 1,051      
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 885      
Gross Amount at Which Carried at Close of Period, Land 363      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,564      
Gross Amount at Which Carried at Close of Period, Total 2,927      
Accumulated Depreciation $ 1,341      
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 2,322      
Gross Amount at Which Carried at Close of Period, Land 234      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,165      
Gross Amount at Which Carried at Close of Period, Total 3,399      
Accumulated Depreciation $ 939      
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 878      
Gross Amount at Which Carried at Close of Period, Land 680      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,494      
Gross Amount at Which Carried at Close of Period, Total 3,174      
Accumulated Depreciation $ 1,262      
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 4,925      
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 5,627      
Gross Amount at Which Carried at Close of Period, Total 7,072      
Accumulated Depreciation $ 2,433      
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 3,444      
Gross Amount at Which Carried at Close of Period, Land 444      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,057      
Gross Amount at Which Carried at Close of Period, Total 5,501      
Accumulated Depreciation $ 1,822      
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 1,487      
Gross Amount at Which Carried at Close of Period, Land 649      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,816      
Gross Amount at Which Carried at Close of Period, Total 4,465      
Accumulated Depreciation $ 1,892      
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 4,020      
Gross Amount at Which Carried at Close of Period, Land 387      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,422      
Gross Amount at Which Carried at Close of Period, Total 5,809      
Accumulated Depreciation $ 1,594      
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 1,009      
Gross Amount at Which Carried at Close of Period, Land 844      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,030      
Gross Amount at Which Carried at Close of Period, Total 3,874      
Accumulated Depreciation $ 1,588      
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 $ 950      
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 4,040      
Gross Amount at Which Carried at Close of Period, Land 517      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,583      
Gross Amount at Which Carried at Close of Period, Total 5,100      
Accumulated Depreciation $ 1,433      
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 3,468      
Gross Amount at Which Carried at Close of Period, Land 321      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,618      
Gross Amount at Which Carried at Close of Period, Total 4,939      
Accumulated Depreciation $ 1,110      
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 917      
Gross Amount at Which Carried at Close of Period, Land 374      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,235      
Gross Amount at Which Carried at Close of Period, Total 2,609      
Accumulated Depreciation $ 1,203      
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 1,200      
Gross Amount at Which Carried at Close of Period, Land 189      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,919      
Gross Amount at Which Carried at Close of Period, Total 2,108      
Accumulated Depreciation $ 1,408      
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 2,081      
Gross Amount at Which Carried at Close of Period, Land 488      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,269      
Gross Amount at Which Carried at Close of Period, Total 3,757      
Accumulated Depreciation $ 1,228      
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 2,343      
Gross Amount at Which Carried at Close of Period, Land 602      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,750      
Gross Amount at Which Carried at Close of Period, Total 4,352      
Accumulated Depreciation $ 1,605      
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 856      
Gross Amount at Which Carried at Close of Period, Land 513      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,786      
Gross Amount at Which Carried at Close of Period, Total 3,299      
Accumulated Depreciation $ 1,536      
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 586      
Gross Amount at Which Carried at Close of Period, Land 194      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,498      
Gross Amount at Which Carried at Close of Period, Total 1,692      
Accumulated Depreciation $ 818      
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 1,302      
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 4,921      
Gross Amount at Which Carried at Close of Period, Total 6,424      
Accumulated Depreciation $ 2,387      
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 500      
Gross Amount at Which Carried at Close of Period, Land 398      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,535      
Gross Amount at Which Carried at Close of Period, Total 1,933      
Accumulated Depreciation $ 875      
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 606      
Gross Amount at Which Carried at Close of Period, Land 424      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,620      
Gross Amount at Which Carried at Close of Period, Total 2,044      
Accumulated Depreciation $ 776      
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 1,271      
Gross Amount at Which Carried at Close of Period, Land 483      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,437      
Gross Amount at Which Carried at Close of Period, Total 2,920      
Accumulated Depreciation $ 1,140      
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 833      
Gross Amount at Which Carried at Close of Period, Land 308      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,949      
Gross Amount at Which Carried at Close of Period, Total 2,257      
Accumulated Depreciation $ 1,075      
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 906      
Gross Amount at Which Carried at Close of Period, Land 174      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,688      
Gross Amount at Which Carried at Close of Period, Total 1,862      
Accumulated Depreciation $ 860      
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 853      
Gross Amount at Which Carried at Close of Period, Land 413      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,852      
Gross Amount at Which Carried at Close of Period, Total 2,265      
Accumulated Depreciation $ 1,077      
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 1,492      
Gross Amount at Which Carried at Close of Period, Land 306      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,895      
Gross Amount at Which Carried at Close of Period, Total 2,201      
Accumulated Depreciation $ 874      
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 3,018      
Gross Amount at Which Carried at Close of Period, Land 479      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,760      
Gross Amount at Which Carried at Close of Period, Total 5,239      
Accumulated Depreciation $ 2,007      
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 1,932      
Gross Amount at Which Carried at Close of Period, Land 883      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,036      
Gross Amount at Which Carried at Close of Period, Total 4,919      
Accumulated Depreciation $ 2,181      
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 1,045      
Gross Amount at Which Carried at Close of Period, Land 316      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,516      
Gross Amount at Which Carried at Close of Period, Total 2,832      
Accumulated Depreciation $ 1,346      
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 1,669      
Gross Amount at Which Carried at Close of Period, Land 651      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,612      
Gross Amount at Which Carried at Close of Period, Total 5,263      
Accumulated Depreciation $ 2,560      
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 1,420      
Gross Amount at Which Carried at Close of Period, Land 715      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,115      
Gross Amount at Which Carried at Close of Period, Total 3,830      
Accumulated Depreciation $ 1,541      
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 2,906      
Gross Amount at Which Carried at Close of Period, Land 619      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,709      
Gross Amount at Which Carried at Close of Period, Total 4,328      
Accumulated Depreciation $ 1,607      
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 2,894      
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 6,113      
Gross Amount at Which Carried at Close of Period, Total 7,489      
Accumulated Depreciation $ 3,083      
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 692      
Gross Amount at Which Carried at Close of Period, Land 244      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,593      
Gross Amount at Which Carried at Close of Period, Total 1,837      
Accumulated Depreciation $ 860      
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 3,528      
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 4,837      
Gross Amount at Which Carried at Close of Period, Total 6,428      
Accumulated Depreciation $ 1,626      
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 3,561      
Gross Amount at Which Carried at Close of Period, Land 612      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,044      
Gross Amount at Which Carried at Close of Period, Total 4,656      
Accumulated Depreciation $ 1,311      
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 2,325      
Gross Amount at Which Carried at Close of Period, Land 256      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,569      
Gross Amount at Which Carried at Close of Period, Total 3,825      
Accumulated Depreciation $ 1,584      
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 2,718      
Gross Amount at Which Carried at Close of Period, Land 313      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,180      
Gross Amount at Which Carried at Close of Period, Total 4,493      
Accumulated Depreciation $ 1,573      
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 1,918      
Gross Amount at Which Carried at Close of Period, Land 385      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,255      
Gross Amount at Which Carried at Close of Period, Total 3,640      
Accumulated Depreciation $ 1,496      
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 2,992      
Gross Amount at Which Carried at Close of Period, Land 730      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,717      
Gross Amount at Which Carried at Close of Period, Total 5,447      
Accumulated Depreciation $ 1,639      
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 1,491      
Gross Amount at Which Carried at Close of Period, Land 863      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,532      
Gross Amount at Which Carried at Close of Period, Total 4,395      
Accumulated Depreciation $ 1,694      
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 1,432      
Gross Amount at Which Carried at Close of Period, Land 326      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,947      
Gross Amount at Which Carried at Close of Period, Total 3,273      
Accumulated Depreciation $ 1,253      
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 3,249      
Gross Amount at Which Carried at Close of Period, Land 369      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,607      
Gross Amount at Which Carried at Close of Period, Total 4,976      
Accumulated Depreciation $ 2,014      
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 2,828      
Gross Amount at Which Carried at Close of Period, Land 720      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,480      
Gross Amount at Which Carried at Close of Period, Total 4,200      
Accumulated Depreciation $ 1,282      
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 896      
Gross Amount at Which Carried at Close of Period, Land 226      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,942      
Gross Amount at Which Carried at Close of Period, Total 2,168      
Accumulated Depreciation $ 1,007      
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 1,038      
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 3,635      
Gross Amount at Which Carried at Close of Period, Total 4,723      
Accumulated Depreciation $ 2,100      
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 1,581      
Gross Amount at Which Carried at Close of Period, Land 526      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,539      
Gross Amount at Which Carried at Close of Period, Total 4,065      
Accumulated Depreciation $ 1,729      
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 1,218      
Gross Amount at Which Carried at Close of Period, Land 672      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,657      
Gross Amount at Which Carried at Close of Period, Total 4,329      
Accumulated Depreciation $ 1,824      
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 2,643      
Gross Amount at Which Carried at Close of Period, Land 796      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,770      
Gross Amount at Which Carried at Close of Period, Total 4,566      
Accumulated Depreciation $ 1,553      
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 3,585      
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 8,583      
Gross Amount at Which Carried at Close of Period, Total 9,725      
Accumulated Depreciation $ 3,428      
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 1,111      
Gross Amount at Which Carried at Close of Period, Land 443      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,713      
Gross Amount at Which Carried at Close of Period, Total 3,156      
Accumulated Depreciation $ 1,434      
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 2,311      
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 5,065      
Gross Amount at Which Carried at Close of Period, Total 6,227      
Accumulated Depreciation $ 2,296      
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 1,685      
Gross Amount at Which Carried at Close of Period, Land 472      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,395      
Gross Amount at Which Carried at Close of Period, Total 3,867      
Accumulated Depreciation $ 1,604      
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 567      
Gross Amount at Which Carried at Close of Period, Land 206      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,478      
Gross Amount at Which Carried at Close of Period, Total 1,684      
Accumulated Depreciation $ 837      
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 767      
Gross Amount at Which Carried at Close of Period, Land 412      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,470      
Gross Amount at Which Carried at Close of Period, Total 2,882      
Accumulated Depreciation $ 1,455      
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 133      
Gross Amount at Which Carried at Close of Period, Land 360      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,774      
Gross Amount at Which Carried at Close of Period, Total 2,134      
Accumulated Depreciation $ 1,027      
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 4,080      
Gross Amount at Which Carried at Close of Period, Land 692      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 6,239      
Gross Amount at Which Carried at Close of Period, Total 6,931      
Accumulated Depreciation $ 2,213      
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 1,434      
Gross Amount at Which Carried at Close of Period, Land 442      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,026      
Gross Amount at Which Carried at Close of Period, Total 3,468      
Accumulated Depreciation $ 1,454      
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 1,070      
Gross Amount at Which Carried at Close of Period, Land 209      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,034      
Gross Amount at Which Carried at Close of Period, Total 2,243      
Accumulated Depreciation $ 1,009      
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 1,138      
Gross Amount at Which Carried at Close of Period, Land 353      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,437      
Gross Amount at Which Carried at Close of Period, Total 2,790      
Accumulated Depreciation $ 1,086      
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 1,062      
Gross Amount at Which Carried at Close of Period, Land 245      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,912      
Gross Amount at Which Carried at Close of Period, Total 2,157      
Accumulated Depreciation $ 936      
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 1,060      
Gross Amount at Which Carried at Close of Period, Land 766      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,860      
Gross Amount at Which Carried at Close of Period, Total 3,626      
Accumulated Depreciation $ 1,392      
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 471      
Gross Amount at Which Carried at Close of Period, Land 442      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,238      
Gross Amount at Which Carried at Close of Period, Total 2,680      
Accumulated Depreciation $ 1,209      
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 1,312      
Gross Amount at Which Carried at Close of Period, Land 408      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,974      
Gross Amount at Which Carried at Close of Period, Total 3,382      
Accumulated Depreciation $ 1,499      
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 448      
Gross Amount at Which Carried at Close of Period, Land 328      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,772      
Gross Amount at Which Carried at Close of Period, Total 2,100      
Accumulated Depreciation $ 1,739      
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 1,548      
Gross Amount at Which Carried at Close of Period, Land 436      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,307      
Gross Amount at Which Carried at Close of Period, Total 3,743      
Accumulated Depreciation $ 1,598      
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 2,484      
Gross Amount at Which Carried at Close of Period, Land 289      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,645      
Gross Amount at Which Carried at Close of Period, Total 3,934      
Accumulated Depreciation $ 457      
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 1,515      
Gross Amount at Which Carried at Close of Period, Land 433      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,375      
Gross Amount at Which Carried at Close of Period, Total 2,808      
Accumulated Depreciation $ 1,053      
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 653      
Gross Amount at Which Carried at Close of Period, Land 345      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,915      
Gross Amount at Which Carried at Close of Period, Total 2,260      
Accumulated Depreciation $ 931      
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 2,855      
Gross Amount at Which Carried at Close of Period, Land 383      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,585      
Gross Amount at Which Carried at Close of Period, Total 3,968      
Accumulated Depreciation $ 939      
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 $ 1,871      
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 1,335      
Gross Amount at Which Carried at Close of Period, Land 359      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,622      
Gross Amount at Which Carried at Close of Period, Total 2,981      
Accumulated Depreciation $ 1,370      
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 2,554      
Gross Amount at Which Carried at Close of Period, Land 297      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,425      
Gross Amount at Which Carried at Close of Period, Total 3,722      
Accumulated Depreciation $ 1,638      
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 657      
Gross Amount at Which Carried at Close of Period, Land 310      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,945      
Gross Amount at Which Carried at Close of Period, Total 2,255      
Accumulated Depreciation $ 1,011      
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 $ 976      
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 791      
Gross Amount at Which Carried at Close of Period, Land 777      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,561      
Gross Amount at Which Carried at Close of Period, Total 4,338      
Accumulated Depreciation $ 1,847      
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 1,903      
Gross Amount at Which Carried at Close of Period, Land 568      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,931      
Gross Amount at Which Carried at Close of Period, Total 4,499      
Accumulated Depreciation $ 1,800      
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 1,191      
Gross Amount at Which Carried at Close of Period, Land 436      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,826      
Gross Amount at Which Carried at Close of Period, Total 3,262      
Accumulated Depreciation $ 1,316      
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 638      
Gross Amount at Which Carried at Close of Period, Land 538      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,668      
Gross Amount at Which Carried at Close of Period, Total 3,206      
Accumulated Depreciation $ 1,477      
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 2,078      
Gross Amount at Which Carried at Close of Period, Land 486      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,205      
Gross Amount at Which Carried at Close of Period, Total 3,691      
Accumulated Depreciation $ 1,265      
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 701      
Gross Amount at Which Carried at Close of Period, Land 487      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,455      
Gross Amount at Which Carried at Close of Period, Total 2,942      
Accumulated Depreciation $ 1,248      
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 524      
Gross Amount at Which Carried at Close of Period, Land 315      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,655      
Gross Amount at Which Carried at Close of Period, Total 1,970      
Accumulated Depreciation $ 890      
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 1,417      
Gross Amount at Which Carried at Close of Period, Land 314      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,530      
Gross Amount at Which Carried at Close of Period, Total 2,844      
Accumulated Depreciation $ 1,223      
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 2,773      
Gross Amount at Which Carried at Close of Period, Land 693      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,822      
Gross Amount at Which Carried at Close of Period, Total 5,515      
Accumulated Depreciation $ 1,874      
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 4,465      
Gross Amount at Which Carried at Close of Period, Land 751      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 7,141      
Gross Amount at Which Carried at Close of Period, Total 7,892      
Accumulated Depreciation $ 2,578      
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 1,113      
Gross Amount at Which Carried at Close of Period, Land 843      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,507      
Gross Amount at Which Carried at Close of Period, Total 5,350      
Accumulated Depreciation $ 2,168      
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 2,524      
Gross Amount at Which Carried at Close of Period, Land 725      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,110      
Gross Amount at Which Carried at Close of Period, Total 5,835      
Accumulated Depreciation $ 2,268      
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 2,082      
Gross Amount at Which Carried at Close of Period, Land 701      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,936      
Gross Amount at Which Carried at Close of Period, Total 5,637      
Accumulated Depreciation $ 2,765      
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 4,140      
Gross Amount at Which Carried at Close of Period, Land 495      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,921      
Gross Amount at Which Carried at Close of Period, Total 6,416      
Accumulated Depreciation $ 1,571      
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 1,829      
Gross Amount at Which Carried at Close of Period, Land 761      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,543      
Gross Amount at Which Carried at Close of Period, Total 5,304      
Accumulated Depreciation $ 2,315      
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 2,944      
Gross Amount at Which Carried at Close of Period, Land 418      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,865      
Gross Amount at Which Carried at Close of Period, Total 5,283      
Accumulated Depreciation $ 2,071      
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 1,533      
Gross Amount at Which Carried at Close of Period, Land 606      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,697      
Gross Amount at Which Carried at Close of Period, Total 4,303      
Accumulated Depreciation $ 1,691      
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 $ 474      
Initial Cost to Company, Building, Equipment and Improvements 1,686      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 814      
Gross Amount at Which Carried at Close of Period, Land 504      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,470      
Gross Amount at Which Carried at Close of Period, Total 2,974      
Accumulated Depreciation $ 1,119      
Date of Construction 1981      
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 $ 346      
Initial Cost to Company, Building, Equipment and Improvements 1,236      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 652      
Gross Amount at Which Carried at Close of Period, Land 346      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,888      
Gross Amount at Which Carried at Close of Period, Total 2,234      
Accumulated Depreciation $ 918      
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 2,134      
Gross Amount at Which Carried at Close of Period, Land 432      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,694      
Gross Amount at Which Carried at Close of Period, Total 4,126      
Accumulated Depreciation $ 1,739      
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 4,625      
Gross Amount at Which Carried at Close of Period, Land 634      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 7,190      
Gross Amount at Which Carried at Close of Period, Total 7,824      
Accumulated Depreciation $ 2,081      
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 577      
Gross Amount at Which Carried at Close of Period, Land 566      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,856      
Gross Amount at Which Carried at Close of Period, Total 3,422      
Accumulated Depreciation $ 1,423      
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 4,760      
Gross Amount at Which Carried at Close of Period, Land 260      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 5,803      
Gross Amount at Which Carried at Close of Period, Total 6,063      
Accumulated Depreciation $ 1,650      
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 2,486      
Gross Amount at Which Carried at Close of Period, Land 616      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,319      
Gross Amount at Which Carried at Close of Period, Total 3,935      
Accumulated Depreciation $ 1,024      
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      
Delray [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
ST FL      
Initial Cost to Company, Land $ 491      
Initial Cost to Company, Building, Equipment and Improvements 1,756      
Cost Capitalized Subsequent to Acquisition, Building, Equipment and Improvements 805      
Gross Amount at Which Carried at Close of Period, Land 491      
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 3,052      
Accumulated Depreciation $ 1,371      
Date of Construction 1969      
Date Acquired Apr. 11, 1997      
Delray [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 [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 586      
Gross Amount at Which Carried at Close of Period, Land 296      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 1,782      
Gross Amount at Which Carried at Close of Period, Total 2,078      
Accumulated Depreciation $ 912      
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 940      
Gross Amount at Which Carried at Close of Period, Land 921      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 4,222      
Gross Amount at Which Carried at Close of Period, Total 5,143      
Accumulated Depreciation $ 2,118      
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 $ 1,534      
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 797      
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 4,550      
Gross Amount at Which Carried at Close of Period, Total 5,583      
Accumulated Depreciation $ 2,303      
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 517      
Gross Amount at Which Carried at Close of Period, Land 735      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 3,946      
Gross Amount at Which Carried at Close of Period, Total 4,681      
Accumulated Depreciation $ 2,039      
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 911      
Gross Amount at Which Carried at Close of Period, Land 231      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,045      
Gross Amount at Which Carried at Close of Period, Total 2,276      
Accumulated Depreciation $ 863      
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 1,947      
Gross Amount at Which Carried at Close of Period, Land 89      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,323      
Gross Amount at Which Carried at Close of Period, Total 2,412      
Accumulated Depreciation $ 988      
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 702      
Gross Amount at Which Carried at Close of Period, Land 293      
Gross Amount at Which Carried at Close of Period, Building, Equipment and Improvements 2,059      
Gross Amount at Which Carried at Close of Period, Total 2,352      
Accumulated Depreciation $ 960      
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