Mortgage Banking - Capitalized Mortgage and Valuation Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Mortgage servicing assets:
Balance at beginning of period	$ 21,873	$ 21,682	$ 22,244	$ 21,666
Loans sold, servicing retained	1,392	2,103	3,799	6,416
Amortization	(1,350)	(1,822)	(4,128)	(6,119)
Carrying value before valuation allowance at end of period	21,915	21,963	21,915	21,963
Valuation allowance:
Balance at beginning of period	(1,180)	(3,641)	(2,707)	(8,513)
Impairment recovery (charges)	97	783	1,624	5,655
Balance at end of period	(1,083)	(2,858)	(1,083)	(2,858)
Net carrying value of MSRs at end of period	20,832	19,105	20,832	19,105
Fair value of MSRs at end of period	$ 27,633	$ 20,189	$ 27,633	$ 20,189