Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income	$ 31,197	$ 12,948	$ 62,740	$ 39,619
Less: Preferred stock dividends	(3,636)	(2,572)	(10,909)	(7,419)
Less: net income attributable to noncontrolling interests	(1,531)	(518)	(3,332)	(1,288)
Less: Net income attributable to participating securities	(129)	(112)	(389)	(339)
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ 25,901	$ 9,746	$ 48,110	$ 30,573
Denominator:
Weighted average shares of common stock outstanding - basic (in shares)	123,548,978	109,645,216	119,153,997	104,653,218
Effect of dilutive securities - performance units (in shares)	294,999	428,858	270,930	360,906
Weighted average shares of common stock outstanding - diluted (in shares)	123,843,977	110,074,074	119,424,927	105,014,124
Earnings per share — Basic
Net income attributable to common stockholders - basic (in dollars per share)	$ 0.21	$ 0.09	$ 0.40	$ 0.29
Earnings per share — Diluted
Net income attributable to common stockholders - diluted (in dollars per share)	$ 0.21	$ 0.09	$ 0.40	$ 0.29