Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income	$ 16,271	$ 15,954	$ 31,543	$ 26,671
Less: Preferred stock dividends	(3,637)	(2,424)	(7,273)	(4,847)
Less: net income attributable to noncontrolling interests	(1,084)	(569)	(1,801)	(770)
Less: Net income attributable to participating securities	(129)	(113)	(260)	(227)
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ 11,421	$ 12,848	$ 22,209	$ 20,827
Denominator:
Weighted average shares of common stock outstanding - basic (in shares)	119,810,283	105,847,557	116,932,359	102,115,849
Effect of dilutive securities - performance units (in shares)	257,893	388,752	258,895	326,931
Weighted average shares of common stock outstanding - diluted (in shares)	120,068,176	106,236,309	117,191,254	102,442,780
Earnings per share — Basic
Net income attributable to common stockholders - basic (in dollars per share)	$ 0.10	$ 0.12	$ 0.19	$ 0.20
Earnings per share — Diluted
Net income attributable to common stockholders - diluted (in dollars per share)	$ 0.10	$ 0.12	$ 0.19	$ 0.20