Annual report pursuant to Section 13 and 15(d)

Organization (Details)

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Organization (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2011
Sovran HHF Storage Holdings LLC [Member]
Dec. 31, 2011
Sovran HHF Storage Holdings LLC II [Member]
Dec. 31, 2011
West Deptford JV, LLC [Member]
Jun. 30, 2011
West Deptford JV, LLC [Member]
Organization [Line Items]          
Number of states in which self-storage properties are owned and managed 25        
Number of self-storage properties owned and managed 435        
Number of properties owned and managed under twenty-percent stake joint venture   25      
Number of properties twenty percent owned under consolidated joint venture       1  
Percentage ownership in unconsolidated joint venture   20.00% 15.00%    
Percentage ownership in consolidated joint venture       20.00% 20.00%
Number of properties owned and managed under fifteen-percent stake joint venture     20    
Number of properties managed with no ownership 9        
Concentration risk, percentage 40.00%