Income Taxes - Significant Components of The Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Deferred tax assets
Allowance for credit losses	$ 50,357	$ 50,712
Loans	2,256	2,855
Deferred compensation	11,991	14,522
Net unrealized losses on securities	53,121	3,545
Impairment of assets	339	392
Net operating loss carryforwards	858	1,211
Investment in partnerships	970	890
Lease liabilities under operating leases	15,160	17,106
Other	3,730	3,241
Total deferred tax assets	138,782	94,474
Deferred tax liabilities
Fixed assets	6,186	5,339
Mortgage servicing rights	22,239	20,779
Junior subordinated debt	2,055	2,130
Intangibles	2,835	3,177
Lease right-of-use asset	14,504	16,209
Other	1,302	1,607
Total deferred tax liabilities	49,121	49,241
Net deferred tax assets	$ 89,661	$ 45,233