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Regulatory Requirements - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Oct. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]      
Number of days from fiscal year end that servicer is obliged to provide audited financial statements   90 days  
Covenant liquidity requirement   $ 27,500,000  
Capital   $ 352,900,000  
Percentage portfolio of loans serviced or subserviced   2.00%  
Cash and cash equivalents   $ 284,802,000 $ 428,339,000
Fannie Mae      
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]      
Capital requirement based on outstanding UPB of owned and subserviced portfolio   269,800,000  
California Department of Business Oversight      
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]      
Litigation settlement expense $ 62,000    
PMC      
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]      
Cash and cash equivalents   $ 257,800,000