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Stockholders' Equity of REIT and Partners' Capital of Operating Partnership - Additional Information (Detail) (USD $)
In Thousands, except Share data in Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Shareholders Equity [Line Items]  
Third party ownership interest of common partnership units 0.41%
Redemption Premium Of Preferred Stock $ 9,108
Series Q Preferred Stock [Member]
 
Shareholders Equity [Line Items]  
Redemption Premium Of Preferred Stock $ 9,100
Preferred Stock Outstanding 2
Liquidation Preference Per share $ 50
Preferred Stock Par Value $ 0.01