CONDENSED CONSOLIDATED STATEMENTS 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
Beginning balance at Dec. 31, 2020	$ 1,991,137	$ 94,016	$ 28	$ 3,196,315	$ (1,301,726)	$ (17,963)	$ 20,467
Beginning 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	11,050						11,050
Redemption of noncontrolling OP units for common (in shares)			129,397
Redemption of noncontrolling OP units for common shares				670			(670)
Redemption of noncontrolling OP units for real estate	(22,305)			(12,919)			(9,386)
Issuance of common shares and deferred compensation amortization, net	60,469			60,469
Issuance of common shares and deferred compensation amortization, net (in shares)			5,866,762
Repurchase of common shares to settle tax obligations	(5,120)			(5,120)
Repurchase of common shares to settle tax obligations (in shares)			(499,638)
Stock issued during period, shares, employee stock purchase plans			(10,264)
Forfeiture of employee common shares	2				2
Dividends/distributions	(96,263)				(94,768)		(1,495)
Net income	122,320				120,358		1,962
Other comprehensive income	7,072
Other comprehensive income	7,072					7,072
Company's share of other comprehensive income of non-consolidated entities	0
Reallocation of noncontrolling interests				435			(435)
Ending balance at Sep. 30, 2021	2,068,362	$ 94,016	$ 28	3,239,850	(1,276,134)	(10,891)	21,493
Ending balance (in shares) at Sep. 30, 2021		1,935,400	282,638,707
Beginning balance at Jun. 30, 2021	2,051,369	$ 94,016	$ 28	3,195,040	(1,250,735)	(12,041)	25,061
Beginning balance (in shares) at Jun. 30, 2021		1,935,400	277,660,102
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of partnership interest in real estate	5,965						5,965
Redemption of noncontrolling OP units for common (in shares)			38,790
Redemption of noncontrolling OP units for common shares				202			(202)
Redemption of noncontrolling OP units for real estate	(22,305)			(12,919)			(9,386)
Issuance of common shares and deferred compensation amortization, net	57,527			57,527
Issuance of common shares and deferred compensation amortization, net (in shares)			4,939,815
Dividends/distributions	(32,402)				(32,037)		(365)
Net income	7,058				6,638		420
Other comprehensive income	1,150
Other comprehensive income	1,150					1,150
Company's share of other comprehensive income of non-consolidated entities	0
Ending balance at Sep. 30, 2021	2,068,362	$ 94,016	$ 28	3,239,850	(1,276,134)	(10,891)	21,493
Ending balance (in shares) at Sep. 30, 2021		1,935,400	282,638,707
Beginning balance at Dec. 31, 2021	2,323,228	$ 94,016	$ 28	3,252,506	(1,049,434)	(6,258)	32,370
Beginning balance (in shares) at Dec. 31, 2021		1,935,400	283,752,726
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of partnership interest in real estate	6,444						6,444
Redemption of noncontrolling OP units for common (in shares)			33,378
Redemption of noncontrolling OP units for common shares				177			(177)
Purchase of noncontrolling interest in consolidated joint venture	(27,958)			(25,058)			(2,900)
Issuance of common shares and deferred compensation amortization, net	44,075		$ 1	44,074
Issuance of common shares and deferred compensation amortization, net (in shares)			4,557,892
Stock repurchased during period, value	(130,676)		$ (1)	(130,675)
Stock repurchased during period (in shares)			(11,702,074)
Repurchase of common shares to settle tax obligations	(6,285)			(6,285)
Repurchase of common shares to settle tax obligations (in shares)			(410,958)
Stock issued during period, shares, employee stock purchase plans			(130,633)
Forfeiture of employee common shares	9				9
Dividends/distributions	(106,388)				(105,292)		(1,096)
Net income	76,037				75,310		727
Other comprehensive income	22,844					22,844
Other comprehensive income	24,026
Company's share of other comprehensive income of non-consolidated entities	1,182					1,182
Ending balance at Sep. 30, 2022	2,202,512	$ 94,016	$ 28	3,134,739	(1,079,407)	17,768	35,368
Ending balance (in shares) at Sep. 30, 2022		1,935,400	276,100,331
Beginning balance at Jun. 30, 2022	2,259,650	$ 94,016	$ 28	3,189,713	(1,068,408)	9,558	34,743
Beginning balance (in shares) at Jun. 30, 2022		1,935,400	281,670,437
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of partnership interest in real estate	663						663
Redemption of noncontrolling OP units for common (in shares)			13,146
Redemption of noncontrolling OP units for common shares				68			(68)
Issuance of common shares and deferred compensation amortization, net	1,916			1,916
Issuance of common shares and deferred compensation amortization, net (in shares)			22,516
Stock repurchased during period, value	(56,958)			56,958
Stock repurchased during period (in shares)			(5,604,048)
Forfeiture of employee common shares	1				1
Forfeiture of employee common shares (in shares)			(1,720)
Dividends/distributions	(34,561)				(34,390)		(171)
Net income	23,591				23,390		201
Other comprehensive income	7,028					7,028
Other comprehensive income	8,210
Company's share of other comprehensive income of non-consolidated entities	1,182					1,182
Ending balance at Sep. 30, 2022	$ 2,202,512	$ 94,016	$ 28	$ 3,134,739	$ (1,079,407)	$ 17,768	$ 35,368
Ending balance (in shares) at Sep. 30, 2022		1,935,400	276,100,331