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Subsequent Events - Additional Information (Detail)
Feb. 01, 2016
UnitHolder
shares
Jan. 25, 2016
$ / shares
Jan. 11, 2016
$ / shares
Dec. 23, 2013
shares
Apr. 01, 2013
shares
Subsequent Event [Line Items]          
Redemption of units in operating partnership | shares       1,000,000 10,000
Subsequent Event [Member]          
Subsequent Event [Line Items]          
Dividend paid | $ / shares     $ 0.08    
Dividend record date   Mar. 15, 2016 Dec. 31, 2015    
Dividend distributed | $ / shares   $ 0.085      
Dividend payment date   Apr. 11, 2016      
Number of unit holders that redeemed units in operating partnership | UnitHolder 2        
Redemption of units in operating partnership | shares 422,687