Servicing Rights - Key Assumptions and the Sensitivity of the Fair Value (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Servicing Assets at Fair Value [Line Items]
Balance of mortgage loans serviced for others	$ 1,484,714,000	$ 1,460,720,000
Weighted average rate of note (percent)	4.50%	4.46%
MSR as a percentage of serviced loans	1.81%	1.81%
Mortgage servicing rights
Servicing Assets at Fair Value [Line Items]
Fair value of MSRs	$ 26,814,000	$ 26,439,000	$ 20,055,000	$ 19,564,000
Expected weighted-average life (in years)	9 years 3 months 21 days	9 years 6 months 3 days
Key assumptions:
Constant prepayment rate (percent)	9.35%	9.09%
Constant prepayment rate, impact on fair value from 10% adverse change	$ (959,000)	$ (935,000)
Constant prepayment rate, impact on fair value from 25% adverse change	$ (2,281,000)	$ (2,222,000)
Discount rate (percent)	10.99%	10.99%
Discount rate, impact on fair value from 100 basis point increase	$ (1,582,000)	$ (1,592,000)
Discount rate, impact on fair value from 200 basis point increase	(2,529,000)	(2,544,000)
Cost to service assumptions ($ per loan)	81	81
Cost to service assumptions, impact on fair value from 10% adverse change	(231,000)	(235,000)
Cost to service assumptions, impact on fair value from 25% adverse change	$ (578,000)	$ (588,000)