Income Taxes - Significant Components of The Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Deferred tax assets
Allowance for credit losses	$ 53,030	$ 52,551
Loans	2,335	2,518
Deferred compensation	10,752	14,447
Net unrealized losses on securities	64,140	70,999
Impairment of assets	180	316
Net operating loss carryforwards	320	497
Investment in partnerships	1,204	1,164
Lease liabilities under operating leases	14,369	14,641
Other	4,707	3,523
Total deferred tax assets	151,037	160,656
Deferred tax liabilities
Fixed assets	10,999	10,342
Mortgage servicing rights	19,775	19,624
Junior subordinated debt	1,888	1,948
Intangibles	2,612	2,702
Lease right-of-use asset	13,736	14,018
Other	1,145	1,614
Total deferred tax liabilities	50,155	50,248
Net deferred tax assets	$ 100,882	$ 110,408