Loan Servicing Rights - Components of Loan Servicing Rights 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	Dec. 31, 2021
Servicing asset:
Balance at beginning of period	$ 38,246	$ 28,262	$ 30,085	$ 28,124
Additions	1,347	3,058	11,013	6,171
Amortization	(1,472)	(2,434)	(2,977)	(5,409)
Balance before valuation allowance at end of period	38,121	28,886	38,121	28,886
Valuation allowance:
Balance at beginning of period	(1)	(146)	(46)	(1,407)
(Additions)/recoveries	1	41	46	1,302
Balance at end of period	0	(105)	0	(105)
Loan servicing rights, net	$ 38,121	$ 28,781	38,121	$ 28,781	$ 30,000
First Midwest
Servicing asset:
Additions			$ 7,700