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Mortgage Banking - Activity in Mortgage Servicing Rights (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Servicing Asset at Fair Value, Amount [Roll Forward]        
Balance at beginning of year $ 20,824,000 $ 15,637,000 $ 20,824,000 $ 16,220,000
Addition of servicing rights   0 708,000 2,286,000
Settlement of sale of MSR asset $ (1,800,000) (16,087,000) (1,806,000) 0
Valuation adjustment, net of amortization   450,000 (4,089,000) 1,219,000
Balance at end of year   0 15,637,000 20,824,000
BTH        
Servicing Asset at Fair Value, Amount [Roll Forward]        
Addition of servicing rights   $ 0 $ 0 $ 1,099,000