CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Shares [Member]	Common Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Distributions in Excess of Net Income [Member]	Deferred Compensation Obligation [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock Common [Member]	Non-Controlling Interests [Member]
Beginning Balance at Dec. 31, 2020	$ 1,944,823	$ 325,000	$ 19,400	$ 5,705,164	$ (4,099,534)	$ 5,479	$ (2,682)	$ (11,319)	$ 3,315
Beginning Balance, shares at Dec. 31, 2020			193,995
Issuance of common shares related to stock plans	263	0	$ 33	230	0	0	0	0	0
Issuance of common shares related to stock plans, shares			331
Issuance of common shares for cash offering	$ 224,974	0	$ 1,696	219,355	0	0	0	3,923	0
Issuance of common shares for cash offering, shares	17,250		16,961
Redemption of preferred shares, Value	$ (150,019)	(150,000)	$ 0	5,137	(5,156)			0
Redemption of preferred shares, shares			0
Stock-based compensation, net	14,752	0	$ 0	13,489	0	(784)	0	2,047	0
Stock-based compensation, net, shares			0
Distributions to non-controlling interests	(67)	0	$ 0	0	0	0	0	0	(67)
Acquisition of non-controlling interest	(7,144)	0	0	(9,209)	0	0	0	0	2,065
Dividends declared-common shares	(99,711)	0	0	0	(99,711)	0	0	0	0
Dividends declared- preferred shares	(13,317)	0	0	0	(13,317)	0	0	0	0
Comprehensive income (loss)	128,098	0	0	0	124,935	0	2,682	0	481
Ending Balance at Dec. 31, 2021	2,042,652	175,000	$ 21,129	5,934,166	(4,092,783)	4,695	0	(5,349)	5,794
Ending Balance, shares at Dec. 31, 2021			211,287
Issuance of common shares related to stock plans	91	0	$ 65	26	0	0	0	0	0
Issuance of common shares related to stock plans, shares			657
Issuance of common shares for cash offering	36,724	0	$ 243	36,481	0	0	0		0
Issuance of common shares for cash offering, shares			2,427
Repurchase of common shares	(42,256)	0	$ 0	0		0	0	(42,256)	0
Stock-based compensation, net	1,342	0	$ 0	4,925	0	330	0	(3,913)	0
Stock-based compensation, net, shares			0
Distributions to non-controlling interests	(73)	0	$ 0	0	0	0	0	0	(73)
Acquisition of non-controlling interest	(1,382)	0	0	(1,382)	0	0	0	0	0
Dividends declared-common shares	(111,150)	0	0	0	(111,150)	0	0	0	0
Dividends declared- preferred shares	(11,156)	0	0	0	(11,156)	0	0	0	0
Comprehensive income (loss)	177,830	0	0	0	168,719	0	9,038	0	73
Ending Balance at Dec. 31, 2022	2,092,622	175,000	$ 21,437	5,974,216	(4,046,370)	5,025	9,038	(51,518)	5,794
Ending Balance, shares at Dec. 31, 2022			214,371
Issuance of common shares related to stock plans	26	0	$ 0	26	0	0	0	0	0
Issuance of common shares related to stock plans, shares			3
Repurchase of common shares	(26,611)	0	$ 0	0	0	0	0	(26,611)	0
Stock-based compensation, net	2,524	0	$ 0	(3,397)	0	142	0	5,779	0
Stock-based compensation, net, shares			0
Distributions to non-controlling interests	(18)	0	$ 0	0	0	0	0	0	(18)
Repurchase of OP units	(1,735)	0	$ 0	4,059	0	0	0	0	(5,794)
Repurchase of OP units, shares			0
Dividends declared-common shares	(142,913)	0	$ 0	0	(142,913)	0	0	0	0
Dividends declared- preferred shares	(11,156)	0	0	0	(11,156)	0	0	0	0
Comprehensive income (loss)	262,804	0	0	0	265,703	0	(2,917)	0	18
Ending Balance at Dec. 31, 2023	$ 2,175,543	$ 175,000	$ 21,437	$ 5,974,904	$ (3,934,736)	$ 5,167	$ 6,121	$ (72,350)	$ 0
Ending Balance, shares at Dec. 31, 2023			214,374