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Regulatory Requirements - Narrative (Details) - USD ($)
1 Months Ended
Oct. 31, 2020
Mar. 31, 2021
Dec. 31, 2020
Public Utilities, General Disclosures [Line Items]      
Net worth requirement   $ 272,000,000.0  
Cash and cash equivalents   259,108,000 $ 284,802,000
PHH Mortgage Corporation      
Public Utilities, General Disclosures [Line Items]      
Net worth   524,200,000  
Restrictive liquidity requirements   27,200,000  
Cash and cash equivalents   $ 227,000,000.0  
CA DBO      
Public Utilities, General Disclosures [Line Items]      
Litigation settlement expense $ 62,000