Mortgage Servicing Rights Summary of Changes in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing Asset [Abstract]
Estimated fair value of MSRs	$ 35,400	$ 28,200
Residential mortgage
Amortized Cost:
Balance at beginning of period	38,745	39,267	$ 38,573
Originations of MSRs	9,216	12,173	7,546
Amortization	(11,968)	(12,695)	(6,852)
Balance at end of period	35,993	38,745	39,267
Servicing Asset [Abstract]
Beginning balance	(10,500)	0	0
Reduction (addition) to valuation allowance	9,900	(10,500)	0
Ending balance	(600)	(10,500)	0
Net MSRs at end of year	35,393	28,245	39,267
Estimated fair value of MSRs	$ 35,393	$ 28,245	$ 45,193