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Basis of Presentation, Consolidation, Investments in Joint Ventures, and Noncontrolling Interests - Redeemable Noncontrolling Interests (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) joint_venture	Mar. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Roll Forward]
Net income allocable to redeemable noncontrolling interests	$ 204	$ 273
Redeemable Noncontrolling Interests
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Roll Forward]
Beginning Balance	52,574	45,743
Net income allocable to redeemable noncontrolling interests	204	273
Distributions declared to redeemable noncontrolling interests	(842)	(795)
Other, net including adjustments to redemption value	(7,192)	1,077
Ending Balance	44,744	46,298
Total limited partners' interests in Operating Partnership and other redeemable noncontrolling interests balance at March 31	44,744	$ 46,298	$ 44,744	$ 52,574
Redeemable Noncontrolling Interests | Partnership Interest
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Roll Forward]
Beginning Balance	46,298
Ending Balance	44,744
Limited partners' interests in Operating Partnership			34,674	36,228
Other redeemable noncontrolling interests in certain subsidiaries			10,070	10,070
Total limited partners' interests in Operating Partnership and other redeemable noncontrolling interests balance at March 31	$ 46,298		$ 44,744	$ 46,298
Capital Unit, Class B
Redeemable Noncontrolling Interest [Line Items]
Number of joint ventures | joint_venture	3
Number of joint ventures accounted for as noncontrolling interest | joint_venture	1

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