Servicing Rights - Key Assumptions and the Sensitivity of the Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Assets at Fair Value [Line Items]
Aggregate portfolio principal balance	$ 772,764	$ 683,117
Base
MSR as a percentage of serviced loans	1.78%	1.64%
Mortgage servicing rights
Servicing Assets at Fair Value [Line Items]
Aggregate portfolio principal balance	$ 772,764	$ 683,117
Weighted average rate of note	3.31%	3.62%
Base
Constant prepayment rate	11.80%	13.05%
Average discount rate	8.00%	7.75%
Mortgage servicing rights, at fair value	$ 13,724	$ 11,218	$ 11,920	$ 10,821
MSR as a percentage of serviced loans	1.78%	1.64%
1.0% Adverse Rate Change
Constant prepayment rate	23.59%	26.11%
Discount rate	7.00%	6.75%
Fair value MSR	$ 9,612	$ 7,455
Percentage of MSR	1.24%	1.09%
2.0% Adverse Rate Change
Constant prepayment rate	34.57%	38.97%
Discount rate	6.00%	5.75%
Fair value MSR	$ 7,256	$ 5,404
Percentage of MSR	0.94%	0.79%