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Mortgage Servicing Rights Summary of Changes in Mortgage Servicing Rights (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Servicing Asset [Abstract]          
Fair value of MSRs $ 51,500   $ 51,500   $ 50,000
Residential Mortgage          
Amortized Cost:          
Balance at beginning of period 32,458 $ 35,249 34,217 $ 35,993  
Originations of MSRs 1,083 1,051 1,967 3,459  
Amortization (1,193) (1,360) (3,836) (4,512)  
Balance at end of period 32,348 34,940 32,348 34,940  
Servicing Asset [Abstract]          
Balance at beginning of period 0 0 0 (600)  
Reduction (addition) to valuation allowance 0 0 0 600  
Balance at end of period 0 0 0 0  
Net MSRs at end of period 32,348 34,940 32,348 34,940  
Fair value of MSRs $ 51,523 $ 51,072 $ 51,523 $ 51,072