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Basis of Presentation - Acquisitions (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Oct. 15, 2019
Mar. 31, 2019
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Mar. 01, 2019
May 31, 2018
Business Acquisition [Line Items]                    
Acquisition-related equity compensation expense     $ 1,212,000   $ 0 $ 2,424,000 $ 0      
Remeasurement gain     0   0 0 2,441,000      
Goodwill impairment expense     0 $ 89,000,000 0 88,675,000 0      
Intangible assets impairment expense       0            
Contingent consideration     14,953,000     14,953,000   $ 28,484,000    
Acquisition related costs     134,000   $ 311,000 446,000 $ 311,000      
5 Arches                    
Business Acquisition [Line Items]                    
Minority interest, percentage                   20.00%
Percent acquired   80.00%                
Contingent consideration maximum amount                   $ 29,000,000
Restricted stock awards       3,000,000            
Intangible assets                 $ 25,000,000  
Contingent consideration     $ 15,000,000     $ 15,000,000     $ 25,000,000  
Cash payment for contingent consideration liability       $ 11,000,000            
CoreVest                    
Business Acquisition [Line Items]                    
Contingent consideration performance term 2 years                  
Restricted stock awards $ 10,000,000                  
Intangible assets $ 57,000,000                  
5 Arches LLC and CoreVest                    
Business Acquisition [Line Items]                    
Goodwill               89,000,000    
Goodwill deductible for tax purposes               $ 75,000,000