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Mortgage Servicing Rights - Unpaid Principal Loan Balance of Servicing Portfolio (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items] |  |
Total | $ 5,385,895 | $ 5,177,404
Federal National Mortgage Association |  |
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items] |  |
Total | 2,486,363 | 2,517,434
Federal Home Loan Mortgage Corporation |  |
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items] |  |
Total | 1,720,075 | 1,630,403
Government National Mortgage Association |  |
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items] |  |
Total | 1,071,769 | 916,455
Federal Home Loan Bank |  |
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items] |  |
Total | 106,410 | 111,699
Other |  |
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items] |  |
Total | $ 1,278 | $ 1,413

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