Mortgage Servicing Rights - Unpaid Principal Loan Balance of Servicing Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]
Total	$ 5,317,972	$ 5,177,404
Federal National Mortgage Association
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]
Total	2,484,667	2,517,434
Federal Home Loan Mortgage Corporation
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]
Total	1,697,816	1,630,403
Government National Mortgage Association
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]
Total	1,027,438	916,455
Federal Home Loan Bank
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]
Total	106,752	111,699
Other
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]
Total	$ 1,299	$ 1,413