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Shareholders' Equity / Partners' Capital - Noncontrolling Interest Reflected in Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Noncontrolling interest	$ 14,455	$ 15,221	$ 4,165
Consolidated Subsidiaries With Noncontrolling Interest
Class of Stock [Line Items]
Noncontrolling interest	0	0	(259)
Class A Units
Class of Stock [Line Items]
Noncontrolling interest	$ 14,455	$ 15,221	$ 4,424

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