Fair Value Measurements - Valuation Assumptions (Details)	Sep. 30, 2024	Dec. 31, 2023
Pull through rate | External pricing model | Weighted Average | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest rate lock commitment, measurement input (percent)	0.9142	0.8984
Constant prepayment rate | Discounted cash flow | Mortgage servicing rights | Minimum | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights, measurement input (percent)	0.0841	0.0613
Constant prepayment rate | Discounted cash flow | Mortgage servicing rights | Maximum | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights, measurement input (percent)	0.1559	0.2533
Constant prepayment rate | Discounted cash flow | Commercial servicing rights | Minimum | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights, measurement input (percent)	0.0399	0.0399
Constant prepayment rate | Discounted cash flow | Commercial servicing rights | Maximum | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights, measurement input (percent)	0.1890	0.1890
Discount rate | External pricing model | Weighted Average | Fair Value, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan measured for credit losses, measurement input (percent)	0.47
Discount rate | Discounted cash flow | Mortgage servicing rights | Minimum | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights, measurement input (percent)	0.0950	0.0950
Discount rate | Discounted cash flow | Mortgage servicing rights | Maximum | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights, measurement input (percent)	0.1100	0.1100
Discount rate | Discounted cash flow | Commercial servicing rights | Weighted Average | Fair Value, Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing rights, measurement input (percent)	0.0950	0.0950