Quarterly Financial Data (Unaudited) - Schedule of Stockholders Equity (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 2,050,204			$ 2,188,390	$ 2,050,204	$ 2,188,390	$ 2,050,204	$ 2,188,390	$ 2,050,204	$ 2,188,390	$ 2,082,757
Balance (in Shares)	88,419,303	86,302,352	86,268,303	86,264,641	85,989,836	87,050,465	86,268,303	87,050,465	86,268,303	87,050,465	86,268,303	87,050,465
Cancellation of OP Units											$ 568
Repurchase of Common Shares						$ (22,400)						$ (22,386)	$ 0
Repurchase of Common Shares (in shares)						(1,219,065)							0
Dividends/distributions declared											(57,057)	(27,155)	$ (103,434)
Employee and trustee stock compensation, net											12,430	10,912	10,006
Noncontrolling interest distributions											(27,051)	(27,574)	(94,283)
Noncontrolling interest contributions											30,164	52,174	161,365
Issuance of Common Shares											63,876		145,498
Acquisition of noncontrolling interest											0	(588)	0
Purchase new program included an optional forward purchase component											63,876		145,498
Comprehensive (loss) income											77,937	(124,345)	(13,519)
Balance											$ 2,149,935	$ 2,050,204	$ 2,188,390
Balance (in Shares)	88,451,668	88,419,303	86,302,352	86,266,122	86,264,641	85,989,836	88,419,303	86,264,641	88,451,668	86,266,122	89,303,545	86,268,303	87,050,465
Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance						$ (400)		$ (400)		$ (400)		$ (400)
Balance													$ (400)
Common Shares
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 86			$ 87	$ 86	$ 87	$ 86	$ 87	$ 86	$ 87	$ 82
Balance (in Shares)			86,269,000			87,050,000	86,269,000	87,050,000	86,269,000	87,050,000	86,269,000	87,050,000	81,557,000
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership (in Shares)											90,000	408,000	308,000
Repurchase of Common Shares												$ (1)
Repurchase of Common Shares (in shares)												(1,219,000)
Employee and trustee stock compensation, net (in Shares)											56,000	30,000	21,000
Issuance of Common Shares (in Shares)											2,889,000		5,164,000
Issuance of Common Shares											$ 3		$ 5
Purchase new program included an optional forward purchase component											3		5
Balance											$ 89	$ 86	$ 87
Balance (in Shares)											89,304,000	86,269,000	87,050,000
Additional Paid-in Capital
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 1,683,165			$ 1,706,357	$ 1,683,165	$ 1,706,357	$ 1,683,165	$ 1,706,357	$ 1,683,165	$ 1,706,357	$ 1,548,603
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership											1,431	6,544	5,104
Repurchase of Common Shares												(22,385)
Employee and trustee stock compensation, net											1,146	782	546
Issuance of Common Shares											63,873		145,493
Purchase new program included an optional forward purchase component											63,873		145,493
Reallocation of noncontrolling interests											4,768	7,197	6,611
Balance											1,754,383	1,683,165	1,706,357
Accumulated Other Comprehensive Income (Loss)
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			(74,891)			(31,474)	(74,891)	(31,474)	(74,891)	(31,474)	(74,891)	(31,474)	516
Comprehensive (loss) income											38,677	(43,417)	(31,990)
Balance											(36,214)	(74,891)	(31,474)
Distributions in Excess of Accumulated Earnings
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			(167,321)			(133,019)	(167,321)	(133,019)	(167,321)	(133,019)	(167,321)	(133,019)	(90,426)
Dividends/distributions declared											(52,872)	(24,937)	(96,310)
Comprehensive (loss) income											23,548	(8,976)	53,717
Balance											(196,645)	(167,321)	(133,019)
Distributions in Excess of Accumulated Earnings | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance						(389)		(389)		(389)		(389)
Balance													(389)
Total Common Shareholders' Equity
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			1,441,039			1,541,951	1,441,039	1,541,951	1,441,039	1,541,951	1,441,039	1,541,951	1,458,775
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership											1,431	6,544	5,104
Repurchase of Common Shares												(22,386)	0
Dividends/distributions declared											(52,872)	(24,937)	(96,310)
Employee and trustee stock compensation, net											1,146	782	546
Issuance of Common Shares											63,876		145,498
Purchase new program included an optional forward purchase component											63,876		145,498
Comprehensive (loss) income											62,225	(52,393)	21,727
Reallocation of noncontrolling interests											4,768	7,197	6,611
Balance											1,521,613	1,441,039	1,541,951
Total Common Shareholders' Equity | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance						(389)		(389)		(389)		(389)
Balance													(389)
Noncontrolling Interests
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			609,165			646,439	609,165	646,439	609,165	646,439	609,165	646,439	623,982
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership											(1,431)	(6,544)	(5,104)
Cancellation of OP Units											568
Dividends/distributions declared											(4,185)	(2,218)	(7,124)
Employee and trustee stock compensation, net											11,284	10,130	9,460
Noncontrolling interest distributions											(27,051)	(27,574)	(94,283)
Noncontrolling interest contributions											30,164	52,174	161,365
Acquisition of noncontrolling interest												15,918
Comprehensive (loss) income											15,712	(71,952)	(35,246)
Reallocation of noncontrolling interests											(4,768)	(7,197)	(6,611)	[1]
Balance											628,322	609,165	646,439
Noncontrolling Interests | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance						(11)		(11)		(11)		(11)
Balance													(11)
Previously Reported
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	$ 2,116,350	$ 2,084,369	2,048,553	$ 2,093,331	$ 2,011,560	2,186,965	2,048,553	2,186,965	2,048,553	2,186,965	2,048,553	2,186,965
Balance (in Shares)		2,084,369
Cumulative effect of change in accounting principle								(400)
Cancellation of OP Units	479								479
Repurchase of Common Shares		$ (45,677)			(34)	(22,352)		(22,386)		(22,386)
Dividends/distributions declared	(14,314)	(14,315)	(13,993)	(123)	(123)	(26,786)	(28,308)	(26,909)	(42,622)	(27,032)
Employee and trustee stock compensation, net	2,644	2,624	4,511	2,413	2,317	3,819	7,135	6,136	9,780	8,551
Noncontrolling interest distributions	(10,527)	(4,355)	(6,676)	(20,117)	(1,418)	(3,118)	(11,031)	(4,536)	(21,558)	(24,654)
Noncontrolling interest contributions	9,518	5,868	11,241	8,427	21,041	7,268	17,109	28,309	26,627	36,736
Issuance of Common Shares	189						45,677		45,865
Acquisition of noncontrolling interest					588			588		588		(588)	0
Purchase new program included an optional forward purchase component	189						45,677		45,865
Comprehensive (loss) income	38,130	(3,518)	40,733	(31,831)	59,400	(133,836)	37,215	(74,436)	75,345	(106,268)		(125,071)	(15,342)
Reallocation of noncontrolling interests
Balance	2,141,511	2,116,350	$ 2,084,369	2,052,100	2,093,331	2,011,560	2,116,350	2,093,331	2,141,511	2,052,100		2,048,553	2,186,965
Balance (in Shares)			2,084,369
Previously Reported | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 2,048,553			2,186,965	2,048,553	2,186,965	2,048,553	2,186,965	2,048,553	2,186,965	2,081,947
Cumulative effect of change in accounting principle						(400)				(400)		(400)
Noncontrolling interest distributions												(27,574)	(94,289)
Noncontrolling interest contributions												52,674	161,628
Issuance of Common Shares													145,498
Acquisition of noncontrolling interest												588
Purchase new program included an optional forward purchase component													145,498
Comprehensive (loss) income												(125,071)	(15,342)
Balance												2,048,553	2,186,965
Previously Reported | Common Shares
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	$ 88	$ 86	$ 86	$ 86	$ 86	$ 87	$ 86	$ 87	$ 86	$ 87	$ 86	$ 87
Balance (in Shares)	88,419,000	86,302,000	86,269,000	86,265,000	85,990,000	87,050,000	86,269,000	87,050,000	86,269,000	87,050,000	86,269,000	87,050,000
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership (in Shares)	18	7	19		260	148	26	408	44	408
Repurchase of Common Shares		$ 2				$ (1)		$ (1)		$ (1)
Repurchase of Common Shares (in shares)		2,072				(1,219)		(1,219)		(1,219)
Employee and trustee stock compensation, net				$ 1
Employee and trustee stock compensation, net (in Shares)	2	38	14		15	11	52	26	54	27
Issuance of Common Shares (in Shares)	13						2,072		2,085
Issuance of Common Shares							$ 2		$ 2
Purchase new program included an optional forward purchase component							2		2
Balance	$ 88	$ 88	$ 86	$ 86	$ 86	$ 86	$ 88	$ 86	$ 88	$ 86		$ 86	$ 87
Balance (in Shares)	88,452,000	88,419,000	86,302,000	86,266	86,265,000	85,990,000	88,419,000	86,265,000	88,452,000	86,266		86,269,000	87,050,000
Previously Reported | Common Shares | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 86			$ 87	$ 86	$ 87	$ 86	$ 87	$ 86	$ 87	$ 82
Balance (in Shares)			86,269			87,050,000	86,269	87,050,000	86,269	87,050,000	86,269	87,050,000	81,557
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership (in Shares)												408	308
Repurchase of Common Shares												$ (1)
Repurchase of Common Shares (in shares)												(1,219)
Employee and trustee stock compensation, net (in Shares)												30,000	21
Issuance of Common Shares (in Shares)													5,164
Issuance of Common Shares													$ 5
Purchase new program included an optional forward purchase component													5
Balance												$ 86	$ 87
Balance (in Shares)												86,269	87,050,000
Previously Reported | Additional Paid-in Capital
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	$ 1,730,686	$ 1,683,552	$ 1,683,165	$ 1,693,006	$ 1,686,794	$ 1,706,357	$ 1,683,165	$ 1,706,357	$ 1,683,165	$ 1,706,357	$ 1,683,165	$ 1,706,357
Balance (in Shares)		1,683,552
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	288	$ 115	294		4,072	2,472	409	6,544	697	6,544
Repurchase of Common Shares		45,675			(34)	(22,351)		(22,385)		(22,385)
Employee and trustee stock compensation, net	225	225	462	232	175	171	687	346	914	578
Issuance of Common Shares	189						45,675		45,863
Purchase new program included an optional forward purchase component	189						45,675		45,863
Reallocation of noncontrolling interests	2,060	1,119	(369)	2,100	1,999	145	750	2,144	2,809	4,244
Balance	1,733,448	1,730,686	$ 1,683,552	1,695,338	1,693,006	1,686,794	1,730,686	1,693,006	1,733,448	1,695,338		1,683,165	$ 1,706,357
Balance (in Shares)			1,683,552
Previously Reported | Additional Paid-in Capital | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 1,683,165			1,706,357	1,683,165	1,706,357	1,683,165	1,706,357	1,683,165	1,706,357	1,548,603
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership												6,544	5,104
Issuance of Common Shares													145,493
Acquisition of noncontrolling interest												(15,330)
Purchase new program included an optional forward purchase component													145,493
Reallocation of noncontrolling interests												7,197	6,611
Balance												1,683,165	1,706,357
Previously Reported | Accumulated Other Comprehensive Income (Loss)
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	(47,909)	$ (41,962)	(74,891)	(90,209)	(85,715)	(31,175)	(74,891)	(31,175)	(74,891)	(31,175)	(74,891)	(31,175)
Balance (in Shares)		(41,962)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership
Repurchase of Common Shares
Employee and trustee stock compensation, net
Comprehensive (loss) income	4,740	$ (5,947)	32,929	4,336	(4,494)	(54,540)	26,982	(59,034)	31,722	(54,698)
Reallocation of noncontrolling interests
Balance	(43,169)	(47,909)	$ (41,962)	(85,873)	(90,209)	(85,715)	(47,909)	(90,209)	(43,169)	(85,873)		(74,891)	(31,175)
Balance (in Shares)			(41,962)
Previously Reported | Accumulated Other Comprehensive Income (Loss) | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ (74,891)			(31,175)	(74,891)	(31,175)	(74,891)	(31,175)	(74,891)	(31,175)	516
Comprehensive (loss) income												(43,716)	(31,691)
Reallocation of noncontrolling interests												0
Balance												(74,891)	(31,175)
Previously Reported | Distributions in Excess of Accumulated Earnings
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	(184,174)	$ (174,829)	(167,046)	(147,291)	(166,701)	(132,961)	(167,046)	(132,961)	(167,046)	(132,961)	(167,046)	(132,961)
Balance (in Shares)		(174,829)
Cumulative effect of change in accounting principle								(389)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership
Repurchase of Common Shares
Dividends/distributions declared	13,268	$ 13,263	12,945			24,937	26,208	24,937	39,476	24,937
Employee and trustee stock compensation, net
Comprehensive (loss) income	12,069	3,918	5,162	(9,030)	19,410	(8,414)	9,080	10,996	21,149	1,966
Reallocation of noncontrolling interests
Balance	(185,373)	(184,174)	$ (174,829)	(156,321)	(147,291)	(166,701)	(184,174)	(147,291)	(185,373)	(156,321)		(167,046)	(132,961)
Balance (in Shares)			(174,829)
Previously Reported | Distributions in Excess of Accumulated Earnings | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ (167,046)			(132,961)	(167,046)	(132,961)	(167,046)	(132,961)	(167,046)	(132,961)	(89,696)
Cumulative effect of change in accounting principle						(389)				(389)		(389)
Comprehensive (loss) income												(8,759)	53,045
Reallocation of noncontrolling interests
Balance												(167,046)	(132,961)
Previously Reported | Total Common Shareholders' Equity
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	1,498,691	$ 1,466,847	1,441,314	1,455,592	1,434,464	1,542,308	1,441,314	1,542,308	1,441,314	1,542,308	1,441,314	1,542,308
Balance (in Shares)		1,466,847
Cumulative effect of change in accounting principle								(389)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	288	$ 115	294		4,072	2,472	409	6,544	697	6,544
Repurchase of Common Shares		(45,677)			(34)	(22,352)		(22,386)		(22,386)
Dividends/distributions declared	13,268	13,263	12,945			24,937	26,208	24,937	39,476	24,937
Employee and trustee stock compensation, net	225	225	462	232	175	171	687	346	914	578
Issuance of Common Shares	189						45,677		45,865
Purchase new program included an optional forward purchase component	189						45,677		45,865
Comprehensive (loss) income	16,809	(2,029)	38,091	(4,694)	14,916	(62,954)	36,062	(48,038)	52,871	(52,732)
Reallocation of noncontrolling interests	2,060	1,119	(369)	2,100	1,999	145	750	2,144	2,809	4,244
Balance	1,504,994	1,498,691	$ 1,466,847	1,453,230	1,455,592	1,434,464	1,498,691	1,455,592	1,504,994	1,453,230		1,441,314	1,542,308
Balance (in Shares)			1,466,847
Previously Reported | Total Common Shareholders' Equity | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 1,441,314			1,542,308	1,441,314	1,542,308	1,441,314	1,542,308	1,441,314	1,542,308	1,459,505
Cumulative effect of change in accounting principle						(389)				(389)		(389)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership												6,544	5,104
Issuance of Common Shares													145,498
Acquisition of noncontrolling interest												(15,330)
Purchase new program included an optional forward purchase component													145,498
Comprehensive (loss) income												(52,475)	21,354
Reallocation of noncontrolling interests												7,197	6,611
Balance												1,441,314	1,542,308
Previously Reported | Noncontrolling Interests
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	617,659	$ 617,522	607,239	637,739	577,096	644,657	607,239	644,657	607,239	644,657	607,239	644,657
Balance (in Shares)		617,522
Cumulative effect of change in accounting principle								(11)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	(288)	$ (115)	(294)		(4,072)	(2,472)	(409)	(6,544)	(697)	(6,544)
Cancellation of OP Units	(479)								(479)
Repurchase of Common Shares
Dividends/distributions declared	1,046	1,052	1,048	123	123	1,849	2,100	1,972	3,146	2,095
Employee and trustee stock compensation, net	2,419	2,399	4,049	2,181	2,142	3,648	6,448	5,790	8,866	7,973
Noncontrolling interest distributions	10,527	4,355	6,676	20,117	1,418	3,118	11,031	4,536	21,558	24,654
Noncontrolling interest contributions	9,518	5,868	11,241	8,427	21,041	7,268	17,109	28,309	26,627	36,736
Acquisition of noncontrolling interest					588			588		588
Comprehensive (loss) income	21,321	(1,489)	2,642	(27,137)	44,484	(70,882)	1,153	(26,398)	22,474	(53,536)
Reallocation of noncontrolling interests	(2,060)	(1,119)	369	(2,100)	(1,999)	(145)	(750)	(2,144)	(2,809)	(4,244)
Balance	636,517	617,659	$ 617,522	598,870	637,739	577,096	617,659	637,739	636,517	598,870		607,239	644,657
Balance (in Shares)			617,522
Previously Reported | Noncontrolling Interests | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 607,239			644,657	607,239	644,657	607,239	644,657	607,239	644,657	622,442
Cumulative effect of change in accounting principle						(11)				(11)		(11)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership												(6,544)	(5,104)
Noncontrolling interest distributions												(27,574)	(94,289)
Noncontrolling interest contributions												52,674	161,628
Issuance of Common Shares
Acquisition of noncontrolling interest												15,918
Purchase new program included an optional forward purchase component
Comprehensive (loss) income												(72,596)	(36,696)
Reallocation of noncontrolling interests												(7,197)	(6,611)
Balance												607,239	644,657
Adjustments
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	612	1,439	1,651	2,114	3,933	1,425	1,651	1,425	1,651	1,425	1,651	1,425
Noncontrolling interest distributions	(400)		(1,000)				(1,000)		(1,400)
Total Adjustment		612						2,114
Comprehensive (loss) income	(534)	(827)	(1,212)	393	(1,819)	2,508	(2,039)	689	(2,573)	1,082		726	1,823
Balance	478	612	1,439	2,507	2,114	3,933	612	2,114	478	2,507		1,651	1,425
Adjustments | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			1,651			1,425	1,651	1,425	1,651	1,425	1,651	1,425	810
Noncontrolling interest distributions												500	(6)
Noncontrolling interest contributions													(263)
Comprehensive (loss) income												726	1,823
Balance												1,651	1,425
Adjustments | Common Shares
Increase Decrease In Stockholders Equity [Roll Forward]
Balance
Balance (in Shares)					0	0		0		0		0
Balance
Balance (in Shares)						0							0
Adjustments | Additional Paid-in Capital
Increase Decrease In Stockholders Equity [Roll Forward]
Balance
Balance
Adjustments | Accumulated Other Comprehensive Income (Loss)
Increase Decrease In Stockholders Equity [Roll Forward]
Balance					(299)	(299)		(299)		(299)		(299)
Comprehensive (loss) income					299			299		299
Balance						(299)							(299)
Adjustments | Accumulated Other Comprehensive Income (Loss) | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance						(299)		(299)		(299)		(299)
Comprehensive (loss) income												299	(299)
Balance													(299)
Adjustments | Distributions in Excess of Accumulated Earnings
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	(827)	(620)	(275)	(133)	49	(58)	(275)	(58)	(275)	(58)	(275)	(58)
Total Adjustment		(827)						(133)
Comprehensive (loss) income	(62)	(207)	(345)	(5)		9	(552)	(75)	(614)	(80)
Balance	(889)	(827)	(620)	(138)	(133)	49	(827)	(133)	(889)	(138)		(275)	(58)
Adjustments | Distributions in Excess of Accumulated Earnings | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			(275)			(58)	(275)	(58)	(275)	(58)	(275)	(58)	(730)
Comprehensive (loss) income												(217)	672
Balance												(275)	(58)
Adjustments | Total Common Shareholders' Equity
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	(827)	(620)	(275)	(133)	(348)	(357)	(275)	(357)	(275)	(357)	(275)	(357)
Total Adjustment		(827)						(133)
Comprehensive (loss) income	(62)	(207)	(345)	(5)	215	9	(552)	224	(614)	219
Balance	(889)	(827)	(620)	(138)	(133)	(348)	(827)	(133)	(889)	(138)		(275)	(357)
Adjustments | Total Common Shareholders' Equity | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			(275)			(357)	(275)	(357)	(275)	(357)	(275)	(357)	(730)
Comprehensive (loss) income												82	373
Balance												(275)	(357)
Adjustments | Noncontrolling Interests
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	1,439	2,059	1,926	2,247	4,281	1,782	1,926	1,782	1,926	1,782	1,926	1,782
Noncontrolling interest distributions	(400)		(1,000)				(1,000)		(1,400)
Total Adjustment		1,439						2,247
Comprehensive (loss) income	(472)	(620)	(867)	398	(2,034)	2,499	(1,487)	465	(1,959)	863
Balance	1,367	1,439	2,059	2,645	2,247	4,281	1,439	2,247	1,367	2,645		1,926	1,782
Adjustments | Noncontrolling Interests | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			1,926			1,782	1,926	1,782	1,926	1,782	1,926	1,782	1,540
Noncontrolling interest distributions												500	(6)
Noncontrolling interest contributions													(263)
Comprehensive (loss) income												644	1,450
Balance												1,926	1,782
As Restated
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	2,116,962	2,085,808	2,050,204	2,095,445	2,015,493	2,188,390	2,050,204	2,188,390	2,050,204	2,188,390	2,050,204	2,188,390
Cumulative effect of change in accounting principle								(400)
Cancellation of OP Units	479								479
Repurchase of Common Shares					(34)	(22,352)		(22,386)		(22,386)
Dividends/distributions declared	(14,314)	(14,315)	(13,993)	(123)	(123)	(26,786)	(28,308)	(26,909)	(42,622)	(27,032)
Employee and trustee stock compensation, net	2,644	2,624	4,511	2,413	2,317	3,819	7,135	6,136	9,780	8,551
Noncontrolling interest distributions	(10,127)	(4,355)	(5,676)	(20,117)	(1,418)	(3,118)	(10,031)	(4,536)	(20,158)	(24,654)
Noncontrolling interest contributions	9,518	5,868	11,241	8,427	21,041	7,268	17,109	28,309	26,627	36,736
Issuance of Common Shares	189	45,677					45,677		45,865
Acquisition of noncontrolling interest					588			588		588		(588)	0
Purchase new program included an optional forward purchase component	189	45,677					45,677		45,865
Comprehensive (loss) income	37,596	(4,345)	39,521	(31,438)	57,581	(131,328)	35,176	(73,747)	72,772	(105,186)		(124,345)	(13,519)
Balance	2,141,989	2,116,962	2,085,808	2,054,607	2,095,445	2,015,493	2,116,962	2,095,445	2,141,989	2,054,607		2,050,204	2,188,390
As Restated | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			2,050,204			2,188,390	2,050,204	2,188,390	2,050,204	2,188,390	2,050,204	2,188,390	2,082,757
Cumulative effect of change in accounting principle						(400)				(400)		(400)
Noncontrolling interest distributions												(27,574)	(94,283)
Noncontrolling interest contributions												52,174	161,365
Issuance of Common Shares													145,498
Acquisition of noncontrolling interest												588
Purchase new program included an optional forward purchase component													145,498
Comprehensive (loss) income													(13,519)
Balance												2,050,204	2,188,390
As Restated | Common Shares
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	$ 88	$ 86	$ 86	$ 86	$ 86	$ 87	$ 86	$ 87	$ 86	$ 87	$ 86	$ 87
Balance (in Shares)	88,419,000	86,302,000	86,269,000	86,265,000	85,990,000	87,050,000	86,269,000	87,050,000	86,269,000	87,050,000	86,269,000	87,050,000
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership										$ 408
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership (in Shares)	18	7	19		260	148	26	408	44
Repurchase of Common Shares						$ (1)		$ (1)		$ (1)
Repurchase of Common Shares (in shares)						(1,219)		(1,219)		(1,219)
Employee and trustee stock compensation, net	$ 2
Employee and trustee stock compensation, net (in Shares)		38	14	1	15	11	52	26	54	27
Issuance of Common Shares (in Shares)	13	2,072					2,072		2,085
Issuance of Common Shares		$ 2					$ 2		$ 2
Purchase new program included an optional forward purchase component		2					2		2
Balance	$ 88	$ 88	$ 86	$ 86	$ 86	$ 86	$ 88	$ 86	$ 88	$ 86		$ 86	$ 87
Balance (in Shares)	88,452,000	88,419,000	86,302,000	86,266	86,265,000	85,990,000	88,419,000	86,265,000	88,452,000	86,266		86,269,000	87,050,000
As Restated | Common Shares | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 86			$ 87	$ 86	$ 87	$ 86	$ 87	$ 86	$ 87	$ 82
Balance (in Shares)			86,269			87,050,000	86,269	87,050,000	86,269	87,050,000	86,269	87,050,000	81,557
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership (in Shares)												408	308
Repurchase of Common Shares												$ 1
Repurchase of Common Shares (in shares)												1,219
Employee and trustee stock compensation, net (in Shares)												30	21
Issuance of Common Shares (in Shares)													5,164
Issuance of Common Shares													$ 5
Purchase new program included an optional forward purchase component													5
Balance												$ 86	$ 87
Balance (in Shares)												86,269	87,050,000
As Restated | Additional Paid-in Capital
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	$ 1,730,686	$ 1,683,552	$ 1,683,165	$ 1,693,006	$ 1,686,794	$ 1,706,357	$ 1,683,165	$ 1,706,357	$ 1,683,165	$ 1,706,357	$ 1,683,165	$ 1,706,357
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	288	115	294		4,072	2,472	409	6,544	697	6,544
Repurchase of Common Shares					(34)	(22,351)		(22,385)		(22,385)
Employee and trustee stock compensation, net	225	225	462	232	175	171	687	346	914	578
Issuance of Common Shares	189	45,675					45,675		45,863
Purchase new program included an optional forward purchase component	189	45,675					45,675		45,863
Reallocation of noncontrolling interests	2,060	1,119	(369)	2,100	1,999	145	750	2,144	2,809	4,244
Balance	1,733,448	1,730,686	1,683,552	1,695,338	1,693,006	1,686,794	1,730,686	1,693,006	1,733,448	1,695,338		1,683,165	$ 1,706,357
As Restated | Additional Paid-in Capital | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			1,683,165			1,706,357	1,683,165	1,706,357	1,683,165	1,706,357	1,683,165	1,706,357	1,548,603
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership												6,544	5,104
Issuance of Common Shares													145,493
Acquisition of noncontrolling interest												(15,330)
Purchase new program included an optional forward purchase component													145,493
Reallocation of noncontrolling interests												7,197	6,611
Balance												1,683,165	1,706,357
As Restated | Accumulated Other Comprehensive Income (Loss)
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	(47,909)	(41,962)	(74,891)	(90,209)	(86,014)	(31,474)	(74,891)	(31,474)	(74,891)	(31,474)	(74,891)	(31,474)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership
Repurchase of Common Shares
Employee and trustee stock compensation, net
Comprehensive (loss) income	4,740	(5,947)	32,929	4,336	(4,195)	(54,540)	26,982	(58,735)	31,722	(54,399)
Balance	(43,169)	(47,909)	(41,962)	(85,873)	(90,209)	(86,014)	(47,909)	(90,209)	(43,169)	(85,873)		(74,891)	(31,474)
As Restated | Accumulated Other Comprehensive Income (Loss) | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			(74,891)			(31,474)	(74,891)	(31,474)	(74,891)	(31,474)	(74,891)	(31,474)	516
Comprehensive (loss) income												(43,417)	(31,990)
Balance												(74,891)	(31,474)
As Restated | Distributions in Excess of Accumulated Earnings
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	(185,001)	(175,449)	(167,321)	(147,424)	(166,750)	(133,019)	(167,321)	(133,019)	(167,321)	(133,019)	(167,321)	(133,019)
Cumulative effect of change in accounting principle								(389)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership
Repurchase of Common Shares
Dividends/distributions declared	13,268	13,263	12,945			24,937	26,208	24,937	39,476	24,937
Employee and trustee stock compensation, net
Comprehensive (loss) income	12,007	3,711	4,817	(9,035)	19,326	(8,405)	8,528	10,921	20,535	1,886
Balance	(186,262)	(185,001)	(175,449)	(156,459)	(147,424)	(166,750)	(185,001)	(147,424)	(186,262)	(156,459)		(167,321)	(133,019)
As Restated | Distributions in Excess of Accumulated Earnings | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			(167,321)			(133,019)	(167,321)	(133,019)	(167,321)	(133,019)	(167,321)	(133,019)	(90,426)
Cumulative effect of change in accounting principle						(389)				(389)		(389)
Comprehensive (loss) income													53,717
Balance												(167,321)	(133,019)
As Restated | Total Common Shareholders' Equity
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	1,497,864	1,466,227	1,441,039	1,455,459	1,434,116	1,541,951	1,441,039	1,541,951	1,441,039	1,541,951	1,441,039	1,541,951
Cumulative effect of change in accounting principle								(389)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	288	115	294		4,072	2,472	409	6,544	697	6,544
Repurchase of Common Shares					(34)	(22,352)		(22,386)		(22,386)
Dividends/distributions declared	13,268	13,263	12,945			24,937	26,208	24,937	39,476	24,937
Employee and trustee stock compensation, net	225	225	462	232	175	171	687	346	914	578
Issuance of Common Shares	189	45,677					45,677		45,865
Purchase new program included an optional forward purchase component	189	45,677					45,677		45,865
Comprehensive (loss) income	16,747	(2,236)	37,746	(4,699)	15,131	(62,945)	35,510	(47,814)	52,257	(52,513)
Reallocation of noncontrolling interests	2,060	1,119	(369)	2,100	1,999	145	750	2,144	2,809	4,244
Balance	1,504,105	1,497,864	1,466,227	1,453,092	1,455,459	1,434,116	1,497,864	1,455,459	1,504,105	1,453,092		1,441,039	1,541,951
As Restated | Total Common Shareholders' Equity | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			1,441,039			1,541,951	1,441,039	1,541,951	1,441,039	1,541,951	1,441,039	1,541,951	1,458,775
Cumulative effect of change in accounting principle						(389)				(389)		(389)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership												6,544	5,104
Issuance of Common Shares													145,498
Acquisition of noncontrolling interest												(15,330)
Purchase new program included an optional forward purchase component													145,498
Comprehensive (loss) income													21,727
Reallocation of noncontrolling interests												7,197	6,611
Balance												1,441,039	1,541,951
As Restated | Noncontrolling Interests
Increase Decrease In Stockholders Equity [Roll Forward]
Balance	619,098	619,581	609,165	639,986	581,377	646,439	609,165	646,439	609,165	646,439	609,165	646,439
Cumulative effect of change in accounting principle								(11)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership	(288)	(115)	(294)		(4,072)	(2,472)	(409)	(6,544)	(697)	(6,544)
Cancellation of OP Units	(479)								(479)
Repurchase of Common Shares
Dividends/distributions declared	1,046	1,052	1,048	123	123	1,849	2,100	1,972	3,146	2,095
Employee and trustee stock compensation, net	2,419	2,399	4,049	2,181	2,142	3,648	6,448	5,790	8,866	7,973
Noncontrolling interest distributions	10,127	4,355	5,676	20,117	1,418	3,118	10,031	4,536	20,158	24,654
Noncontrolling interest contributions	9,518	5,868	11,241	8,427	21,041	7,268	17,109	28,309	26,627	36,736
Acquisition of noncontrolling interest					588			588		588
Comprehensive (loss) income	20,849	(2,109)	1,775	(26,739)	42,450	(68,383)	(334)	(25,933)	20,515	(52,673)
Reallocation of noncontrolling interests	(2,060)	(1,119)	369	(2,100)	(1,999)	(145)	(750)	(2,144)	(2,809)	(4,244)
Balance	$ 637,884	$ 619,098	619,581	$ 601,515	$ 639,986	581,377	619,098	639,986	637,884	601,515		609,165	646,439
As Restated | Noncontrolling Interests | Cumulative Effect Period Of Adoption Adjustment [Member]
Increase Decrease In Stockholders Equity [Roll Forward]
Balance			$ 609,165			646,439	$ 609,165	$ 646,439	$ 609,165	646,439	$ 609,165	646,439	623,982
Cumulative effect of change in accounting principle						$ (11)				$ (11)		(11)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership												(6,544)	(5,104)
Noncontrolling interest distributions												(27,574)	(94,283)
Noncontrolling interest contributions												52,174	161,365
Acquisition of noncontrolling interest												15,918
Comprehensive (loss) income													(35,246)
Reallocation of noncontrolling interests												(7,197)	(6,611)
Balance												$ 609,165	$ 646,439

[1] Adjustment reflects the difference between the fair value of the consideration received or paid and the book value of the Common Shares, Common OP Units, Preferred OP Units, and LTIP Units involving changes in ownership.