CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	COMMON SHARES, $0.01 PAR VALUE	PAID IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	DISTRIBUTIONS	OPERATING PARTNERSHIP	PARTIALLY OWNED PROPERTIES
Balance, beginning of year at Dec. 31, 2021		$ 37,280	$ 3,755	$ 9,121,122	$ 1,827,063	$ (34,272)
Balance, beginning of year at Dec. 31, 2021								$ 214,094	$ 18,166
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares				1,680
Exercise of share options			4	21,017
Employee Share Purchase Plan (ESPP)			1	3,279
Share-based employee compensation expense:
Issuance of restricted units/shares			2	9,524				1
Share options				1,856
ESPP discount				637
Offering costs				(739)
Supplemental Executive Retirement Plan (SERP)				(269)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(27,383)					(4,795)
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership	$ (127,570)			127,570
Adjustment for Noncontrolling Interests ownership in Operating Partnership				9,156				(9,156)
PAID IN CAPITAL
Conversion of OP Units into Common Shares				1,680
Exercise of share options			4	21,017
Employee Share Purchase Plan (ESPP)			1	3,279
RETAINED EARNINGS
Net Income (Loss)	617,891				617,891
Common Share distributions					(705,529)
Preferred Share distributions					(2,318)
Accumulated other comprehensive income (loss) - derivative instruments:
Unrealized holding gains (losses) arising during the period	23,413					23,413
Losses reclassified into earnings from other comprehensive income	9,987					9,987
DISTRIBUTIONS
Distributions declared per Common Share outstanding							$ 1.875
NONCONTROLLING INTERESTS
Issuance of restricted units/shares			2	9,524				1
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(1,680)
Equity compensation associated with Noncontrolling Interests								16,502
Net income attributable to Noncontrolling Interests	21,024							21,024	2,726
Distributions to Noncontrolling Interests								(23,078)	(18,267)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	(870)							870
Adjustment for Noncontrolling Interests ownership in Operating Partnership				9,156				(9,156)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	21,024							21,024	2,726
Contributions by Noncontrolling Interests									603
Distributions to Noncontrolling Interests								(23,078)	(18,267)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(27,383)					(4,795)
Balance, end of period at Sep. 30, 2022		37,280	3,762	9,267,450	1,737,107	(872)
Balance, end of period at Sep. 30, 2022								218,577	(1,567)
Balance, beginning of year at Jun. 30, 2022		37,280	3,761	9,229,738	1,649,960	(30,650)
Balance, beginning of year at Jun. 30, 2022								216,326	(1,734)
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares				196
Exercise of share options				2,093
Employee Share Purchase Plan (ESPP)			1	901
Share-based employee compensation expense:
Issuance of restricted units/shares				2,165
Share options				466
ESPP discount				217
Offering costs				(252)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(28)					28
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership				29,430
Adjustment for Noncontrolling Interests ownership in Operating Partnership				2,524				(2,524)
PAID IN CAPITAL
Conversion of OP Units into Common Shares				196
Exercise of share options				2,093
Employee Share Purchase Plan (ESPP)			1	901
RETAINED EARNINGS
Net Income (Loss)	323,025				323,025
Common Share distributions					(235,105)
Preferred Share distributions					(773)
Accumulated other comprehensive income (loss) - derivative instruments:
Unrealized holding gains (losses) arising during the period	24,672					24,672
Losses reclassified into earnings from other comprehensive income	5,106					5,106
DISTRIBUTIONS
Distributions declared per Common Share outstanding							0.625
NONCONTROLLING INTERESTS
Issuance of restricted units/shares				2,165
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(196)
Equity compensation associated with Noncontrolling Interests								3,343
Net income attributable to Noncontrolling Interests	10,997							10,997	1,143
Distributions to Noncontrolling Interests								(7,590)	(1,004)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership								(1,779)
Adjustment for Noncontrolling Interests ownership in Operating Partnership				2,524				(2,524)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	10,997							10,997	1,143
Distributions to Noncontrolling Interests								(7,590)	(1,004)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(28)					28
Balance, end of period at Sep. 30, 2022		37,280	3,762	9,267,450	1,737,107	(872)
Balance, end of period at Sep. 30, 2022								218,577	(1,567)
Balance, beginning of year at Dec. 31, 2022	11,173,439	37,280	3,784	9,476,085	1,658,837	(2,547)
Balance, beginning of year at Dec. 31, 2022	209,240							209,961	(721)
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares			9	13,907
Exercise of share options			2	11,472
Employee Share Purchase Plan (ESPP)				2,591
Share-based employee compensation expense:
Issuance of restricted units/shares			2	10,292				1
Share options				3,904
ESPP discount				481
Supplemental Executive Retirement Plan (SERP)				32,078
Acquisition of Noncontrolling Interests – Partially Owned Properties				(900)					(2,837)
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership	(18,613)			18,613
Adjustment for Noncontrolling Interests ownership in Operating Partnership				20,534				(20,534)
PAID IN CAPITAL
Conversion of OP Units into Common Shares			9	13,907
Exercise of share options			2	11,472
Employee Share Purchase Plan (ESPP)				2,591
RETAINED EARNINGS
Net Income (Loss)	523,746				523,746
Common Share distributions					(753,633)
Preferred Share distributions					(2,318)
Accumulated other comprehensive income (loss) - derivative instruments:
Unrealized holding gains (losses) arising during the period	4,514					4,514
Losses reclassified into earnings from other comprehensive income	3,132					3,132
DISTRIBUTIONS
Distributions declared per Common Share outstanding							1.9875
NONCONTROLLING INTERESTS
Issuance of restricted units/shares			2	10,292				1
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(13,916)
Equity compensation associated with Noncontrolling Interests								14,205
Net income attributable to Noncontrolling Interests	17,174							17,174	5,299
Distributions to Noncontrolling Interests								(22,924)	(3,573)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	(21,878)							21,878
Adjustment for Noncontrolling Interests ownership in Operating Partnership				20,534				(20,534)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	17,174							17,174	5,299
Contributions by Noncontrolling Interests									9
Distributions to Noncontrolling Interests								(22,924)	(3,573)
Acquisition of Noncontrolling Interests – Partially Owned Properties				(900)					(2,837)
Balance, end of period at Sep. 30, 2023	11,061,865	37,280	3,797	9,589,057	1,426,632	5,099
Balance, end of period at Sep. 30, 2023	204,022							205,845	(1,823)
Balance, beginning of year at Jun. 30, 2023		37,280	3,790	9,472,628	1,506,460	3,708
Balance, beginning of year at Jun. 30, 2023								207,405	(4,728)
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares			7	9,250
Exercise of share options				116
Employee Share Purchase Plan (ESPP)				467
Share-based employee compensation expense:
Issuance of restricted units/shares				2,349
Share options				779
ESPP discount				83
Supplemental Executive Retirement Plan (SERP)				31,930
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership				57,736
Adjustment for Noncontrolling Interests ownership in Operating Partnership				13,719				(13,719)
PAID IN CAPITAL
Conversion of OP Units into Common Shares			7	9,250
Exercise of share options				116
Employee Share Purchase Plan (ESPP)				467
RETAINED EARNINGS
Net Income (Loss)	172,508				172,508
Common Share distributions					(251,563)
Preferred Share distributions					(773)
Accumulated other comprehensive income (loss) - derivative instruments:
Unrealized holding gains (losses) arising during the period	460					460
Losses reclassified into earnings from other comprehensive income	931					931
DISTRIBUTIONS
Distributions declared per Common Share outstanding							$ 0.6625
NONCONTROLLING INTERESTS
Issuance of restricted units/shares				2,349
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(9,257)
Equity compensation associated with Noncontrolling Interests								3,338
Net income attributable to Noncontrolling Interests	5,561							5,561	3,217
Distributions to Noncontrolling Interests								(7,284)	(312)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership								19,801
Adjustment for Noncontrolling Interests ownership in Operating Partnership				13,719				(13,719)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	5,561							5,561	3,217
Distributions to Noncontrolling Interests								(7,284)	(312)
Balance, end of period at Sep. 30, 2023	11,061,865	$ 37,280	$ 3,797	$ 9,589,057	$ 1,426,632	$ 5,099
Balance, end of period at Sep. 30, 2023	$ 204,022							$ 205,845	$ (1,823)