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Basis of Presentation, Consolidation, Investments in Joint Ventures, and Noncontrolling Interests - Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning of period			$ 698	$ 698
Net income allocable to noncontrolling interests,   excluding redeemable noncontrolling interests	$ 147	$ (17)	926	188
Balance at end of period	$ 698	$ 698	698	698
Excluding Redeemable Non-Controlling Interests
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income allocable to noncontrolling interests,   excluding redeemable noncontrolling interests			$ 0	$ 0

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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