Loan Servicing Activity of MSRs and the related valuation allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Servicing Asset at Amortized Cost, Beginning Balance	$ 12,210	$ 10,070	$ 10,178
Servicing Asset at Amortized Cost, Additions	4,945	8,627	2,355
Servicing Asset at Amortized Cost, Amortization	3,512	4,123	1,870
Servicing Asset at Amortized Cost, Increase (Decrease) for Valuation Allowance Adjustment	1,621	(2,364)	(593)
Servicing Asset at Amortized Cost, Ending Balance	15,264	12,210	10,070
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance, Beginning Balance	3,189	825	232
Valuation Allowance for Impairment of Recognized Servicing Assets, Additions (Deductions) for Expenses (Recoveries)	(1,621)	2,364	593
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance, Ending Balance	$ 1,568	$ 3,189	$ 825