Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share of Common Stock - Additional Information (Detail)

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Earnings per Share of Common Stock - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share [Abstract]      
Weighted average number of OP units held by the non-controlling interest 345,485 353,405  
Unvested shares of restricted common stock   974,406 734,763