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Basis of Presentation - Narrative (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($) shares	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) partnership	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Variable Interest Entity [Line Items]
Number of partnerships consolidated | partnership				2
VIE, ownership interest rate				80.00%
Amortization of purchase-related intangible assets	$ 3,873		$ 3,873	$ 7,746	$ 8,182
5 Arches
Variable Interest Entity [Line Items]
Intangible assets						$ 25,000
Shares issued for settlement of remaining deferred consideration | shares		806,068
Cash payment for contingent consideration liability		$ 1,000
CoreVest
Variable Interest Entity [Line Items]
Intangible assets						$ 57,000

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The amount of identifiable intangible assets recognized as of the acquisition date.

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