Earnings Per Common Share - Schedule of Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerators:
Net income available for Common Stockholders – Basic	$ 61,051	$ 46,187	$ 126,291	$ 113,062
Amounts allocated to dilutive securities	3,021	2,658	6,768	6,507
Net income available for Common Stockholders – Fully Diluted	$ 64,072	$ 48,845	$ 133,059	$ 119,569
Denominators:
Weighted average common shares outstanding – basic (in shares)	182,337	181,833	182,142	181,781
Effect of dilutive securities:
Exchange of common OP units for common shares (in shares)	10,153	10,482	10,312	10,486
Stock options and restricted stock (in shares)	211	227	214	271
Weighted average common shares outstanding – fully diluted (in shares)	192,701	192,542	192,668	192,538
Earnings per common share – basic (usd per share)	$ 0.33	$ 0.25	$ 0.69	$ 0.62
Earnings per common share – fully diluted (usd per share)	$ 0.33	$ 0.25	$ 0.69	$ 0.62