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Mortgage Indebtedness - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Sponsor
Dec. 31, 2011
Sponsor
Sep. 16, 2011
Sponsor
Dec. 31, 2012
Third Parties
Sep. 16, 2011
Third Parties
Dec. 31, 2012
Mortgages
Mortgage Loans on Real Estate [Line Items]                  
Debt $ 92,413     $ 38,075   $ 64,575 $ 54,338    
Debt sold to third parties               26,500  
Interest paid 3,271 1,727 0 968 1,347        
Fair value of fixed-rate indebtedness                 $ 95,827