Servicing Rights - Key Assumptions and the Sensitivity of the Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Servicing Assets at Fair Value [Line Items]
Aggregate portfolio principal balance	$ 789,382	$ 772,764
Base
Percentage of MSR (percent)	1.95%	1.78%
Mortgage servicing rights
Servicing Assets at Fair Value [Line Items]
Aggregate portfolio principal balance	$ 789,382	$ 772,764
Weighted average rate of note (percent)	3.27%	3.31%
Base
Constant prepayment rate (percent)	8.93%	11.80%
Discount rate (percent)	8.00%	8.00%
Fair value MSR	$ 15,422	$ 13,724	$ 11,657	$ 11,218
Percentage of MSR (percent)	1.95%	1.78%
1.0% Adverse Rate Change
Constant prepayment rate (percent)	17.87%	23.59%
Discount rate (percent)	7.00%	7.00%
Fair value MSR	$ 11,213	$ 9,612
Percentage of MSR (percent)	1.42%	1.24%
2.0% Adverse Rate Change
Constant prepayment rate (percent)	26.79%	34.57%
Discount rate (percent)	6.00%	6.00%
Fair value MSR	$ 8,621	$ 7,256
Percentage of MSR (percent)	1.09%	0.94%