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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income	$ 28,157	$ 7,403	$ 66,325	$ 37,628
Income attributable to non-controlling interests	(93)	(116)	(384)	(621)
Write-off of preferred share original issuance costs	0	0	(5,156)	0
Preferred dividends	(2,789)	(5,133)	(10,867)	(15,399)
Earnings attributable to unvested shares and OP units	(150)	0	(450)	(149)
Net income attributable to common shareholders after allocation to participating securities	$ 25,125	$ 2,154	$ 49,468	$ 21,459
Denominators – Number of Shares
Basic—Average shares outstanding	211,048	193,203	206,918	193,366
Diluted—Average shares outstanding	212,191	193,365	208,074	193,366
PRSUs	1,114	162	1,146	0
Forward equity	29	0	10	0
Earnings Per Share:
Basic	$ 0.12	$ 0.01	$ 0.24	$ 0.11
Diluted	$ 0.12	$ 0.01	$ 0.24	$ 0.11