Quarterly report pursuant to Section 13 or 15(d)

Organization (Narrative) (Details)

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Organization (Narrative) (Details) (USD $)
9 Months Ended 12 Months Ended 6 Months Ended 9 Months Ended 1 Months Ended
Sep. 30, 2011
Dec. 31, 2010
Dec. 31, 2008
Sep. 30, 2011
Sovran HHF Storage Holdings [Member]
Sep. 30, 2011
Sovran HHF Storage Holdings II [Member]
Jun. 30, 2011
West Deptford JV LLC [Member]
Sep. 30, 2011
West Deptford JV LLC [Member]
May 31, 2011
Locke Sovran II LLC [Member]
Number of self-storage properties owned and managed 432              
Concentration risk, percentage 40.00%              
Number of states in which self-storage properties owned and managed 25              
Number of properties managed with no ownership 8              
Number of properties owned and managed under twenty-percent stake joint venture     25 25        
Number of properties twenty-percent owned under consolidated joint venture             1  
Percentage ownership in unconsolidated joint venture       20.00% 15.00%      
Number of properties owned and managed under fifteen-percent stake joint venture 19       19      
Percentage ownership in consolidated joint venture             20.00% 100.00%
Stockholders' Equity, Other $ 17,000,000             $ 17,000,000
Reduction of additional-paid-in capital               3,900,000
Payments to acquire businesses and interest in affiliates           4,200,000    
Preferred interest in investment           8.00%    
Percentage of ownership interest of the Subsidiary and its limited partnership which controls the operations of the Operating Partnership 98.80%              
Units of redeemable noncontrolling interest in operating partnerships 339,025 339,025            
Noncontrolling interest repayment               2,800,000
Payments to noncontrolling interests               $ 14,200,000