Earnings Per Share - Reconciliation of Net Income and Number of Common Shares Used in Computations of "Basic" EPS and "Diluted" EPS (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income	$ 16,181	$ 34,628
Income attributable to non-controlling interests	(173)	(295)
Preferred dividends	(5,133)	(5,133)
Earnings attributable to unvested shares and OP units	(115)	(149)
Net income attributable to common shareholders after allocation to participating securities	$ 10,760	$ 29,051
Denominators – Number of Shares
Basic—Average shares outstanding	198,534	193,726
Assumed conversion of dilutive securities	911	0
Diluted—Average shares outstanding	199,445	193,726
Earnings Per Share:
Basic	$ 0.05	$ 0.15
Diluted	$ 0.05	$ 0.15