Servicing Rights - Mortgage Servicing Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in fair value:
Balance of mortgage loans serviced for others	$ 772,764	$ 683,117
MSR as a percentage of serviced loans	1.78%	1.64%
Mortgage servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 11,218	$ 11,920	$ 10,821
Additions for new MSR capitalized	6,088	4,824	3,707
Changes in fair value:
Due to changes in model inputs of assumptions	(1,181)	(2,701)	(1,313)
Other	(2,401)	(2,825)	(1,295)
Carrying value, December 31	13,724	11,218	$ 11,920
Balance of mortgage loans serviced for others	$ 772,764	$ 683,117
MSR as a percentage of serviced loans	1.78%	1.64%