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Capitalized Mortgage Servicing Rights (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Capitalized Mortgage Servicing Rights    
Beginning balance $ 422,734  
Ending balance 401,471 $ 422,734
MSRs    
Capitalized Mortgage Servicing Rights    
Beginning balance 422,734 379,974
Additions 83,115 134,116
Amortization (59,876) (58,615)
Write-downs and payoffs (44,502) (32,741)
Ending balance 401,471 422,734
Prepayment fees collected 48,200 $ 38,200
Valuation allowance 0  
Expected amortization of capitalized MSRs balances    
2023 61,024  
2024 59,025  
2025 55,033  
2026 49,121  
2027 44,287  
Thereafter 132,981  
Total $ 401,471  
MSRs | Weighted average    
Capitalized Mortgage Servicing Rights    
Estimated life remaining 8 years 7 months 6 days 8 years 6 months
Originated    
Capitalized Mortgage Servicing Rights    
Beginning balance $ 395,573 $ 336,466
Additions 83,115 134,116
Amortization (53,449) (47,845)
Write-downs and payoffs (38,361) (27,164)
Ending balance 386,878 395,573
Acquired    
Capitalized Mortgage Servicing Rights    
Beginning balance 27,161 43,508
Amortization (6,427) (10,770)
Write-downs and payoffs (6,141) (5,577)
Ending balance $ 14,593 $ 27,161