Mortgage Servicing Rights - Estimated Fair Value (Details) - Mortgage Servicing Rights	Sep. 30, 2024	Dec. 31, 2023
Range of discount rates | Maximum
Mortgage Servicing Rights
Valuation assumptions	0.1225	0.1225
Range of discount rates | Minimum
Mortgage Servicing Rights
Valuation assumptions	0.0975	0.0975
Range of prepayment speeds | Maximum
Mortgage Servicing Rights
Valuation assumptions	2.82	2.82
Range of prepayment speeds | Minimum
Mortgage Servicing Rights
Valuation assumptions	0.86	0.86
Weighted average default rate
Mortgage Servicing Rights
Valuation assumptions	0.0124	0.0124