Financial Instruments - Summary of Fair Value Measurement Inputs and Valuation Techniques (Details)	Sep. 30, 2022	Dec. 31, 2021
IRLCs | Pull-through rate | Marketing pricing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.917	0.711
IRLCs | Pull-through rate | Marketing pricing | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.580
IRLCs | Pull-through rate | Marketing pricing | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	1.000
MSRs | Prepayment speed | Valuation Technique, Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.065
MSRs | Prepayment speed | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.060
MSRs | Prepayment speed | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.142
MSRs | Default rates | Valuation Technique, Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.001
MSRs | Default rates | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.000
MSRs | Default rates | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.005
MSRs | Discount rate | Valuation Technique, Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.096
MSRs | Discount rate | Valuation Technique, Discounted Cash Flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.095
MSRs | Discount rate | Valuation Technique, Discounted Cash Flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative instrument, measurement input (percent)	0.124