Shareholders' Equity, Noncontrolling Interests and Other Comprehensive Loss - Summary of Change in Noncontrolling Interest (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Increase Decrease In Stockholders Equity [Roll Forward]
Beginning Balance		$ 609,165
Net income		26,030		$ (65,718)		$ 23,234
Other comprehensive income (loss) - unrealized gain (loss) on valuation of swap agreements		30,500		(73,686)		(35,883)
Reclassification of realized interest on swap agreements		(21,407)		(15,059)		870
Noncontrolling interest contributions		30,164		52,174		161,365
Noncontrolling interest distributions		(27,051)		(27,574)		(94,283)
Employee Long-term Incentive Plan Unit Awards		12,430		10,912		10,006
Acquisition of noncontrolling interest asset		0		(588)		0
Ending Balance		628,322		609,165
Noncontrolling Interests in Partially-Owned Affiliates
Increase Decrease In Stockholders Equity [Roll Forward]
Beginning Balance		519,734		549,720
Ending Balance				519,734		549,720
Operating Partnership, as General Partner or Managing Member
Increase Decrease In Stockholders Equity [Roll Forward]
Beginning Balance		89,431		96,719
Ending Balance				89,431		96,719
Noncontrolling Interests
Increase Decrease In Stockholders Equity [Roll Forward]
Beginning Balance		609,165		646,439		623,982
Distributions declared per Common OP Unit		(4,185)		(2,218)		(7,124)
Net income		2,482		(56,742)		(30,483)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership		(1,431)		(6,544)		(5,104)
Cancellation of OP Units	[1]	(568)
Other comprehensive income (loss) - unrealized gain (loss) on valuation of swap agreements		5,990		(20,704)		(4,845)
Reclassification of realized interest on swap agreements		7,240		5,494		82
Noncontrolling interest contributions		30,164		52,174		161,365
Noncontrolling interest distributions		(27,051)		(27,574)		(94,283)
Employee Long-term Incentive Plan Unit Awards		11,284		10,130		9,460
Reallocation of noncontrolling interests		(4,768)		(7,197)		(6,611)	[1]
Acquisition of noncontrolling interest asset				15,918
Ending Balance		628,322		609,165		646,439
Noncontrolling Interests | Noncontrolling Interests in Partially-Owned Affiliates
Increase Decrease In Stockholders Equity [Roll Forward]
Beginning Balance		519,734	[2]	548,769		519,759
Distributions declared per Common OP Unit		0	[2]
Net income		407	[2]	(56,867)		(34,319)
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership		0	[2]
Cancellation of OP Units	[1],[2]	0
Other comprehensive income (loss) - unrealized gain (loss) on valuation of swap agreements		3,918	[2]	(17,995)		(2,946)
Reclassification of realized interest on swap agreements		7,030	[2]	5,320		144
Noncontrolling interest contributions		30,164	[2]	52,174		161,365
Noncontrolling interest distributions		(27,051)	[2]	(27,574)		(94,283)
Employee Long-term Incentive Plan Unit Awards		0	[2]
Reallocation of noncontrolling interests		0	[2]
Acquisition of noncontrolling interest asset				15,918
Ending Balance		534,202	[2]	519,734	[2]	548,769
Noncontrolling Interests | Noncontrolling Interests in Partially-Owned Affiliates | Cumulative Effect of Change in Accounting Principle
Increase Decrease In Stockholders Equity [Roll Forward]
Beginning Balance		(11)
Ending Balance				(11)
Noncontrolling Interests | Operating Partnership, as General Partner or Managing Member
Increase Decrease In Stockholders Equity [Roll Forward]
Beginning Balance		89,431	[3]	97,670		104,223
Distributions declared per Common OP Unit		(4,185)	[3]	(2,218)		(7,124)
Net income		2,075	[3]	125		3,836
Conversion of OP Units to Common Shares by limited partners of the Operating Partnership		(1,431)	[3]	(6,544)		(5,104)
Cancellation of OP Units	[1],[3]	(568)
Other comprehensive income (loss) - unrealized gain (loss) on valuation of swap agreements		2,072	[3]	(2,709)		(1,899)
Reclassification of realized interest on swap agreements		210	[3]	174		(62)
Noncontrolling interest contributions		0	[3]
Noncontrolling interest distributions		0	[3]
Employee Long-term Incentive Plan Unit Awards		11,284	[3]	10,130		9,460
Reallocation of noncontrolling interests		(4,768)	[3]	(7,197)		(6,611)	[1]
Acquisition of noncontrolling interest asset
Ending Balance		94,120	[3]	89,431	[3]	$ 97,670
Noncontrolling Interests | Operating Partnership, as General Partner or Managing Member | Noncontrolling Interests in Partially-Owned Affiliates | Cumulative Effect of Change in Accounting Principle
Increase Decrease In Stockholders Equity [Roll Forward]
Beginning Balance
Ending Balance

[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.

[2] Noncontrolling interests in partially-owned affiliates comprise third-party interests in Funds II, III, IV and V, and Mervyns II, and five other subsidiaries.

[3] Noncontrolling interests in the Operating Partnership are comprised of (i) the limited partners’ 3,076,849, 3,101,958, and 3,250,603 Common OP Units at December 31, 2021, 2020 and 2019, respectively; (ii) 188 Series A Preferred OP Units at December 31, 2021, 2020 and 2019; (iii) 126,593 Series C Preferred OP Units at December 31, 2021 and 2020, and 136,593 at December 31, 2019; and (iv) 3,371,296, 2,886,207, and 2,673,484 LTIP units at December 31, 2021, 2020 and 2019, respectively, as discussed in Share Incentive Plan (Note 14). Distributions declared for Preferred OP Units are reflected in net income (loss) in the table above.