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Basis of Presentation - Narrative (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
partnership
shares
Mar. 31, 2020
USD ($)
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 $ 4,309  
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