Earnings Per Share and Earnings Per Unit - Computation of Net Income per Share Basic and Net Income per Share Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 73,798	$ 60,364
Allocation to Noncontrolling Interests – Operating Partnership	(2,394)	(2,143)
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties	(639)	(682)
Preferred distributions	(772)	(773)
Net income available to Common Shares	69,993	56,766
Numerator for net income per share – diluted	$ 72,387	$ 58,909
Weighted average Common Shares outstanding	375,509	372,280
OP Units	11,888	13,050
Dilutive Securities Options	2,090	1,586
ATM forward sales	141
Denominator for net income per share – diluted	389,628	386,916
Net income per share – basic	$ 0.19	$ 0.15
Net income per share – diluted	$ 0.19	$ 0.15