Income Taxes - Significant Components of The Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Deferred tax assets
Allowance for credit losses	$ 51,156	$ 50,712
Loans	2,017	2,855
Deferred compensation	14,029	14,522
Net unrealized losses on securities	73,827	3,545
Impairment of assets	355	392
Net operating loss carryforwards	682	1,211
Investment in partnerships	1,010	890
Lease liabilities under operating leases	15,013	17,106
Other	2,954	3,241
Total deferred tax assets	161,043	94,474
Deferred tax liabilities
Fixed assets	9,735	5,339
Mortgage servicing rights	18,984	20,779
Junior subordinated debt	2,018	2,130
Intangibles	2,817	3,177
Lease right-of-use asset	14,395	16,209
Other	1,178	1,607
Total deferred tax liabilities	49,127	49,241
Net deferred tax assets	$ 111,916	$ 45,233