CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Preferred Shares	Common Shares	Additional Paid-in-Capital	Accumulated Distributions in Excess of Net Income	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Balance at beginning of period at Dec. 31, 2018	$ 1,346,678	$ 94,016	$ 24	$ 2,772,855	$ (1,537,100)	$ 76	$ 16,807
Beginning balance (in shares) at Dec. 31, 2018		1,935,400	235,008,554
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of partnership interest in real estate	867						867
Redemption of noncontrolling OP units for common (in shares)			391,993
Redemption of noncontrolling OP units for common shares				1,655			(1,655)
Issuance of common shares and deferred compensation amortization, net	209,373		$ 2	209,371
Issuance of common shares and deferred compensation amortization, net (in shares)			20,579,745
Repurchase of common shares	(958)			(958)
Repurchase of common shares (in shares)			(441,581)
Repurchase of common shares to settle tax obligations	(5,281)		$ (1)	(5,280)
Repurchase of common shares to settle tax obligations (in shares)			(712,430)
Forfeiture of employee common shares	15			0	15
Forfeiture of employee common shares (in shares)			(55,562)
Dividends/distributions	(109,264)				(106,501)		(2,763)
Net Income	285,293				279,910		5,383
Reallocation of noncontrolling interests				(973)			973
Other comprehensive loss	(2,004)					(2,004)
Balance at end of period at Dec. 31, 2019	1,724,719	$ 94,016	$ 25	2,976,670	(1,363,676)	(1,928)	19,612
Ending balance (in shares) at Dec. 31, 2019		1,935,400	254,770,719
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of partnership interest in real estate	1,285						1,285
Redemption of noncontrolling OP units for common (in shares)			327,453
Redemption of noncontrolling OP units for common shares				1,614			(1,614)
Issuance of common shares and deferred compensation amortization, net	231,699		$ 3	231,696
Issuance of common shares and deferred compensation amortization, net (in shares)			23,962,696
Repurchase of common shares	(11,042)			(11,042)
Repurchase of common shares (in shares)			(1,329,940)
Repurchase of common shares to settle tax obligations	(2,623)		$ 0	(2,623)
Repurchase of common shares to settle tax obligations (in shares)			(576,011)
Forfeiture of employee common shares	1				1
Forfeiture of employee common shares (in shares)			(2,467)
Dividends/distributions	(123,258)				(121,353)		(1,905)
Net Income	186,391				183,302		3,089
Other comprehensive loss	(16,035)					(16,035)
Balance at end of period at Dec. 31, 2020	1,991,137	$ 94,016	$ 28	3,196,315	(1,301,726)	(17,963)	20,467
Ending balance (in shares) at Dec. 31, 2020		1,935,400	277,152,450
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of partnership interest in real estate	21,901						21,901
Redemption of noncontrolling OP units for common (in shares)			185,270
Redemption of noncontrolling OP units for common shares				958			(958)
Redemption of noncontrolling OP units for real estate	(22,305)			(12,919)			(9,386)
Issuance of common shares and deferred compensation amortization, net	73,851			73,851
Issuance of common shares and deferred compensation amortization, net (in shares)			6,993,194
Repurchase of common shares to settle tax obligations	(6,134)			(6,134)
Repurchase of common shares to settle tax obligations (in shares)			(567,924)
Forfeiture of employee common shares	2				2
Forfeiture of employee common shares (in shares)			(10,264)
Dividends/distributions	(132,020)				(130,358)		(1,662)
Net Income	385,091				382,648		2,443
Other comprehensive loss	11,705					11,705
Reallocation of noncontrolling interests				435			(435)
Balance at end of period at Dec. 31, 2021	$ 2,323,228	$ 94,016	$ 28	$ 3,252,506	$ (1,049,434)	$ (6,258)	$ 32,370
Ending balance (in shares) at Dec. 31, 2021		1,935,400	283,752,726