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Mortgage Servicing Rights - Unpaid Principal Loan Balance of Servicing Portfolio (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]    
Total $ 5,177,404 $ 4,761,832
Federal National Mortgage Association    
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]    
Total 2,517,434 2,352,981
Federal Home Loan Mortgage Corporation    
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]    
Total 1,630,403 1,512,858
Government National Mortgage Association    
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]    
Total 916,455 759,524
Federal Home Loan Bank    
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]    
Total 111,699 134,616
Other    
Financing Receivable, Unpaid Principal Balance Of Servicing Portfolio [Line Items]    
Total $ 1,413 $ 1,853