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
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)	10,752
Other comprehensive income (loss)	5,887
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
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
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
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)	(18,013)
Other comprehensive income (loss)	$ 1,355
Ending balance (in shares) at Jun. 30, 2023	172,101,929	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
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	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