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Regulatory Requirements - Narrative (Details)
$ in Millions
3 Months Ended
Mar. 31, 2023
USD ($)
loanCount
Dec. 31, 2022
USD ($)
Mar. 31, 2022
USD ($)
Public Utilities, General Disclosures [Line Items]      
Net worth requirement $ 376.8    
Cash and cash equivalents 216.6 $ 208.0  
Assets serviced $ 200,000.0 199,600.0 $ 194,000.0
Percentage of portfolio to total forward owned servicing 7.00%    
Percentage of government-insured loans UPB to total UPB serviced and sub-serviced 5.00%    
Owned MSRs      
Public Utilities, General Disclosures [Line Items]      
Assets serviced $ 127,600.0 $ 126,200.0 $ 115,700.0
Owned MSRs | Unpaid Principal Balance      
Public Utilities, General Disclosures [Line Items]      
Assets serviced $ 13,700.0    
Owned MSRs | Loan Count      
Public Utilities, General Disclosures [Line Items]      
Assets Serviced, Number Of Loans | loanCount 85,336    
CA DFPI      
Public Utilities, General Disclosures [Line Items]      
Litigation Settlement, Amount Awarded to Other Party $ 2.5    
PHH Mortgage Corporation      
Public Utilities, General Disclosures [Line Items]      
Net worth 553.3    
Restrictive liquidity requirements 42.1    
Cash and cash equivalents $ 188.0