CONSOLIDATED STATEMENTS OF BENEFICIARIES’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Deferred Compensation Payable in Common 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, 2019		176,480,095	1,105,542
Beneficiaries' Equity, beginning balance at Dec. 31, 2019	$ 1,688,303	$ 1,766	$ 16,216	$ 3,192,158	$ (16,216)	$ 804,556	$ (2,370)	$ (2,318,233)	$ 10,426
Parent Company
Net income	307,326					305,527			1,799
Other comprehensive income (loss)	$ (5,220)						(5,191)		(29)
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)	(6,248,483)	(6,248,483)
Repurchase and retirement of Common Shares of Beneficial Interest	$ (59,999)	$ (62)		(59,937)
Sale of partnership interest to consolidated real estate venture	(1,017)								(1,017)
Distributions from consolidated real estate venture	(22)								(22)
Share-based compensation activity (in shares)		309,096	50,967
Share-based compensation activity	6,236	$ 3		6,233
Share Issuance from/(to) Deferred Compensation Plan (in shares)		32,256	3,985
Share Issuance from/(to) Deferred Compensation Plan	(206)		$ 1,300	(206)	(1,300)
Reallocation of Noncontrolling Interest	0			(96)					96
Distributions declared	(130,753)							(130,005)	(748)
Ending balance (in shares) at Dec. 31, 2020		170,572,964	1,160,494
Beneficiaries' Equity, ending balance at Dec. 31, 2020	1,804,648	$ 1,707	$ 17,516	3,138,152	(17,516)	1,110,083	(7,561)	(2,448,238)	10,505
Parent Company
Net income	12,366					12,289			77
Other comprehensive income (loss)	5,569						5,541		28
Issuance of Common Shares of Beneficial Interest (in shares)		226,695
Issuance of Common Shares of Beneficial Interest	$ 3,052	$ 3		3,049
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)	0
Issuance of partnership interest in consolidated real estate venture	$ 2,765								2,765
Redemption of LP Units	(2,334)								(2,334)
Share-based compensation activity (in shares)		344,656	70,645
Share-based compensation activity	6,354	$ 2		6,352
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(18,058)	(61,436)
Share Issuance from/(to) Deferred Compensation Plan	(198)		$ 975	(198)	(975)
Reallocation of Noncontrolling Interest	0			(569)					569
Distributions declared	(131,003)							(130,345)	(658)
Ending balance (in shares) at Dec. 31, 2021		171,126,257	1,169,703
Beneficiaries' Equity, ending 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
Parent Company
Net income	53,992					53,824			168
Other comprehensive income (loss)	$ 5,935						5,917		18
Repurchase and retirement of Common Shares of Beneficial Interest (in shares)	0
Redemption of LP Units	$ (4,006)								(4,006)
Share-based compensation activity (in shares)		469,529	85,384
Share-based compensation activity	7,718	$ 4		7,714
Share Issuance from/(to) Deferred Compensation Plan (in shares)		(25,979)	(75,444)
Share Issuance from/(to) Deferred Compensation Plan	(312)		$ 1,110	(312)	(1,110)
Reallocation of Noncontrolling Interest	(1)			(959)		(1)			959
Distributions declared	(131,211)							(130,822)	(389)
Ending balance (in shares) at Dec. 31, 2022		171,569,807	1,179,643
Beneficiaries' Equity, ending 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