Mortgage Banking - Capitalized Mortgage and Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Mortgage servicing assets:
Balance at beginning of period	$ 21,666	$ 10,801	$ 10,419
Loans sold, servicing retained	8,471	8,595	2,191
Mortgage servicing rights acquired	0	9,747
Amortization	(7,893)	(7,477)	(1,809)
Carrying value before valuation allowance at end of period	22,244	21,666	10,801
Valuation allowance:
Balance at beginning of period	(8,513)	(534)	(300)
Impairment recovery (charges)	5,807	(7,979)	(234)
Balance at end of period	(2,706)	(8,513)	(534)
Net carrying value of MSRs at end of period	19,538	13,153	10,267
Fair value of MSRs at end of period	$ 20,921	$ 13,153	$ 10,378