Mortgage Banking - Capitalized Mortgage and Valuation Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Mortgage servicing assets:
Balance at beginning of period	$ 22,189	$ 21,696	$ 22,244	$ 21,666
Loans sold, servicing retained	1,059	1,939	2,407	4,313
Amortization	(1,375)	(1,953)	(2,778)	(4,297)
Carrying value before valuation allowance at end of period	21,873	21,682	21,873	21,682
Valuation allowance:
Balance at beginning of period	(1,474)	(3,193)	(2,707)	(8,513)
Impairment recovery (charges)	294	(448)	1,527	4,872
Balance at end of period	(1,180)	(3,641)	(1,180)	(3,641)
Net carrying value of MSRs at end of period	20,693	18,041	20,693	18,041
Fair value of MSRs at end of period	$ 26,927	$ 18,054	$ 26,927	$ 18,054