CONSOLIDATED STATEMENTS OF BENEFICIARIES’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Rabbi Trust/Deferred Compensation Shares	Additional Paid-in Capital	Common Shares in Grantor Trust	Cumulative Earnings	Accumulated Other Comprehensive Income (Loss)	Cumulative Distributions	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2021		171,126,257	1,169,703
Beginning balance at Dec. 31, 2021	$ 1,701,219	$ 1,712	$ 18,491	$ 3,146,786	$ (18,491)	$ 1,122,372	$ (2,020)	$ (2,578,583)	$ 10,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	6,101					6,093			8
Other comprehensive income (loss)	3,952						3,940		12
Redemption of LP Units	(4,006)								(4,006)
Share-based compensation activity (in shares)		277,061	68,540
Share-based compensation activity	1,655	$ 2		1,653
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(19,406)	(52,702)
Share Issuance from/(to) Deferred Compensation Plan	(249)		$ 895	(249)	(895)
Reallocation of Noncontrolling interest	0			(959)					959
Distributions declared	(32,809)							(32,711)	(98)
Ending balance (in shares) at Mar. 31, 2022		171,383,912	1,185,541
Ending balance at Mar. 31, 2022	$ 1,675,863	$ 1,714	$ 19,386	3,147,231	(19,386)	1,128,465	1,920	(2,611,294)	7,827
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Beginning balance (in shares) at Dec. 31, 2021		171,126,257	1,169,703
Beginning balance at Dec. 31, 2021	$ 1,701,219	$ 1,712	$ 18,491	3,146,786	(18,491)	1,122,372	(2,020)	(2,578,583)	10,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	24,230
Other comprehensive income (loss)	6,565
Ending balance (in shares) at Sep. 30, 2022		171,569,807	1,179,643
Ending balance at Sep. 30, 2022	1,634,949	$ 1,716	$ 19,601	3,151,177	(19,601)	1,146,543	4,525	(2,676,702)	7,690
Beginning balance (in shares) at Mar. 31, 2022		171,383,912	1,185,541
Beginning balance at Mar. 31, 2022	1,675,863	$ 1,714	$ 19,386	3,147,231	(19,386)	1,128,465	1,920	(2,611,294)	7,827
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,651					4,637			14
Other comprehensive income (loss)	1,935						1,929		6
Share-based compensation activity (in shares)		191,368	16,844
Share-based compensation activity	1,917	$ 2		1,915
Share Issuance from/(to) Deferred Compensation Plan	0		$ 215		(215)
Distributions declared	(32,803)							(32,705)	(98)
Ending balance (in shares) at Jun. 30, 2022		171,575,280	1,202,385
Ending balance at Jun. 30, 2022	$ 1,651,563	$ 1,716	$ 19,601	3,149,146	(19,601)	1,133,102	3,849	(2,643,999)	7,749
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Net income (loss)	$ 13,478					13,441			37
Other comprehensive income (loss)	678						676		2
Share-based compensation activity (in shares)		1,100
Share-based compensation activity	2,094			2,094
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(6,573)	(22,742)
Share Issuance from/(to) Deferred Compensation Plan	(63)			(63)
Distributions declared	(32,801)							(32,703)	(98)
Ending balance (in shares) at Sep. 30, 2022		171,569,807	1,179,643
Ending balance at Sep. 30, 2022	$ 1,634,949	$ 1,716	$ 19,601	3,151,177	(19,601)	1,146,543	4,525	(2,676,702)	7,690
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Beginning balance (in shares) at Dec. 31, 2022	171,569,807	171,569,807	1,179,643
Beginning balance at Dec. 31, 2022	$ 1,633,334	$ 1,716	$ 19,601	3,153,229	(19,601)	1,176,195	3,897	(2,709,405)	7,702
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,276)					(5,259)			(17)
Other comprehensive income (loss)	(5,291)						(5,307)		16
Share-based compensation activity (in shares)		171,318	22,449
Share-based compensation activity	3,371	$ 1		3,370
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(13,422)	(48,733)
Share Issuance from/(to) Deferred Compensation Plan	(88)		$ 145	(88)	(145)
Reallocation of Noncontrolling interest	0			(4)					4
Distributions declared	(32,832)							(32,734)	(98)
Ending balance (in shares) at Mar. 31, 2023		171,727,703	1,153,359
Ending balance at Mar. 31, 2023	$ 1,593,218	$ 1,717	$ 19,746	3,156,507	(19,746)	1,170,936	(1,410)	(2,742,139)	7,607
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Beginning balance (in shares) at Dec. 31, 2022	171,569,807	171,569,807	1,179,643
Beginning balance at Dec. 31, 2022	$ 1,633,334	$ 1,716	$ 19,601	3,153,229	(19,601)	1,176,195	3,897	(2,709,405)	7,702
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(39,649)
Other comprehensive income (loss)	$ 4,240
Ending balance (in shares) at Sep. 30, 2023	172,097,661	172,097,661	1,194,127
Ending balance at Sep. 30, 2023	$ 1,514,368	$ 1,719	$ 19,965	3,161,568	(19,965)	1,136,686	8,125	(2,801,074)	7,344
Beginning balance (in shares) at Mar. 31, 2023		171,727,703	1,153,359
Beginning balance at Mar. 31, 2023	1,593,218	$ 1,717	$ 19,746	3,156,507	(19,746)	1,170,936	(1,410)	(2,742,139)	7,607
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(12,737)					(12,696)			(41)
Other comprehensive income (loss)	6,646						6,626		20
Share-based compensation activity (in shares)		374,226	54,056
Share-based compensation activity	2,616	$ 2		2,614
Share Issuance from/(to) Deferred Compensation Plan	0		$ 219		(219)
Reallocation of Noncontrolling interest	0			155					(155)
Distributions declared	(33,083)							(32,985)	(98)
Ending balance (in shares) at Jun. 30, 2023		172,101,929	1,207,415
Ending balance at Jun. 30, 2023	$ 1,556,660	$ 1,719	$ 19,965	3,159,276	(19,965)	1,158,240	5,216	(2,775,124)	7,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.19
Net income (loss)	$ (21,636)					(21,554)			(82)
Other comprehensive income (loss)	2,885						2,909		(24)
Share-based compensation activity	2,506			2,506
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(4,268)	(13,288)
Share Issuance from/(to) Deferred Compensation Plan	(20)			(20)
Reallocation of Noncontrolling interest	0			(194)					194
Distributions declared	$ (26,027)							(25,950)	(77)
Ending balance (in shares) at Sep. 30, 2023	172,097,661	172,097,661	1,194,127
Ending balance at Sep. 30, 2023	$ 1,514,368	$ 1,719	$ 19,965	$ 3,161,568	$ (19,965)	$ 1,136,686	$ 8,125	$ (2,801,074)	$ 7,344
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions declared (in dollars per share)	$ 0.15