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Reconciliation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Earnings Per Share [Abstract]    
Net income (loss) $ 4,245 $ (46)
(Income) loss allocated to non-controlling interests (168) (29)
Net income (loss) allocable to common shares $ 4,077 $ (75)
Weighted-average shares outstanding—Basic 68,787,155 47,093,343
Weighted-average shares outstanding—Diluted 68,958,786 47,093,343
Basic $ 0.06  
Diluted $ 0.06