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Pro Forma of Financial Information Purport to Represent Results of Operations for Future Periods (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Real Estate Properties [Line Items]    
Total revenue from acquisitions, as reported $ 8,135 $ 4,688
Pro forma revenue 4,721 4,569
Net income (loss) allocable to common shares from acquisitions, as reported 2,935 [1] 4 [1]
Pro forma net income (loss) allocable to common shares $ 3,346 $ 881
Earnings (loss) per share    
Basic-as reported $ 0.19 $ 0.01
Diluted-as reported $ 0.19 $ 0.00
Basic-pro forma $ 0.22 $ 2.55
Diluted-pro forma $ 0.22 $ 0.16
[1] The fair value of a property acquired exceeded the purchase price and a gain of $2,882 was recorded.