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Basis of Presentation, Consolidation, Investments in Joint Ventures, and Noncontrolling Interests - Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Roll Forward]
Net income allocable to redeemable noncontrolling interests	$ 132	$ (40)	$ 1,058	$ 148
Redeemable Noncontrolling Interests
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Roll Forward]
Balance at beginning of period			43,275	52,574
Net income allocable to redeemable noncontrolling interests			1,058	148
Distributions declared to redeemable noncontrolling interests			(1,639)	(1,222)
Other, net including adjustments to redemption value			10,587	(7,060)
Balance at end of period	53,281	44,440	53,281	44,440
Total limited partners' interests in Operating Partnership and other redeemable noncontrolling interests balance at September 30	53,281	44,440	53,281	44,440
Redeemable Noncontrolling Interests | Partnership Interest
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Roll Forward]
Balance at end of period	53,281	44,440	53,281	44,440
Limited partners' interests in Operating Partnership	43,211	34,370	43,211	34,370
Other redeemable noncontrolling interests in certain subsidiaries	10,070	10,070	10,070	10,070
Total limited partners' interests in Operating Partnership and other redeemable noncontrolling interests balance at September 30	$ 53,281	$ 44,440	$ 53,281	$ 44,440

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Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

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