Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Numerator:
Net income	$ 5,721	$ 1,477
Less: Preferred stock dividends	(1,322)	0
Less: net income attributable to noncontrolling interest	(132)	(52)
Less: Net income attributable to participating securities	(91)	(78)
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ 4,176	$ 1,347
Denominator:
Weighted average shares of common stock outstanding - basic (in shares)	66,341,138	55,269,598
Effect of dilutive securities - performance units (in shares)	285,101	147,349
Weighted average shares of common stock outstanding - diluted (in shares)	66,626,239	55,416,947
Earnings per share — Basic
Net income attributable to common stockholders (in dollars per share)	$ 0.06	$ 0.02
Earnings per share — Diluted
Net income attributable to common stockholders (in dollars per share)	$ 0.06	$ 0.02