Earnings Per Share - Reconciliation of Net Income (Loss) and Number of Common Shares Used in Computations of "Basic" EPS and "Diluted" EPS (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 125,416	$ 36,590	$ 101,825
Income attributable to non-controlling interests	(481)	(869)	(1,126)
Write-off of preferred share original issuance costs	(5,156)	0	(7,176)
Preferred dividends	(13,656)	(20,531)	(32,231)
Earnings attributable to unvested shares and OP Units	(572)	(204)	(687)
Net income attributable to common shareholders after allocation to participating securities	$ 105,551	$ 14,986	$ 60,605
Denominators – Number of Shares
Basic – Average shares outstanding	208,004	193,336	183,026
OP units	141	0	0
Diluted – Average shares outstanding	209,143	193,777	183,254
PRSUs	973	441	228
Forward equity	25	0	0
Earnings Per Share:
Basic	$ 0.51	$ 0.08	$ 0.33
Diluted	$ 0.51	$ 0.08	$ 0.33