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Fair Value Measurements - Unobservable Inputs (Details) - USD ($)
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Min | MSRs(1)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 6.80% 6.90%
Prepayment speed 7.70% 6.80%
Cost to service per loan(3) $ 53 $ 56
Min | Mortgage loans held for sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Market pricing $ 0.450 $ 0.450
Min | IRLCs    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Value of servicing (reflected as a percentage of loan commitment) 0 0.011
Min | Excess spread financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 6.90% 7.00%
Prepayment speed 7.00% 7.70%
Min | Mortgage servicing rights financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Advance financing and counterparty fee rates 7.10% 6.60%
Annual advance recovery rates 15.00% 12.20%
Max | MSRs(1)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 12.30% 12.30%
Prepayment speed 8.70% 9.30%
Cost to service per loan(3) $ 123 $ 160
Max | Mortgage loans held for sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Market pricing $ 1.023 $ 1.034
Max | IRLCs    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Value of servicing (reflected as a percentage of loan commitment) 0.038 0.035
Max | Excess spread financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 12.30% 12.30%
Prepayment speed 9.40% 9.10%
Max | Mortgage servicing rights financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Advance financing and counterparty fee rates 9.30% 9.20%
Annual advance recovery rates 16.50% 14.80%
Weighted Average | MSRs(1)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 7.70% 8.00%
Prepayment speed 7.90% 7.50%
Cost to service per loan(3) $ 68 $ 80
Average life(4) 7 years 9 months 18 days 7 years 10 months 24 days
Weighted Average | Mortgage loans held for sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Market pricing $ 0.794 $ 0.811
Weighted Average | IRLCs    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Value of servicing (reflected as a percentage of loan commitment) 0.016 0.019
Weighted Average | Excess spread financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 8.70% 8.80%
Prepayment speed 8.30% 8.40%
Average life(4) 6 years 8 months 12 days 6 years 8 months 12 days
Weighted Average | Mortgage servicing rights financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Advance financing and counterparty fee rates 8.30% 7.60%
Annual advance recovery rates 16.00% 13.00%