Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Allowance for credit losses	$ 53,432	$ 52,551
Loans	1,631	2,518
Deferred compensation	15,310	14,447
Net unrealized losses on securities	51,211	70,999
Impairment of assets	138	316
Tax credits	4,035	0
Net operating loss carryforwards	33	497
Investments in partnerships	1,491	1,164
Lease liabilities under operating leases	13,066	14,641
Realized losses on securities	4,892	0
Other	2,660	3,523
Total deferred tax assets	147,899	160,656
Deferred tax liabilities
Fixed assets	11,023	10,342
Mortgage servicing rights	21,282	19,624
Junior subordinated debt	1,708	1,948
Intangibles	2,447	2,702
Lease right-of-use asset	12,399	14,018
Other	3,344	1,614
Total deferred tax liabilities	52,203	50,248
Net deferred tax assets	$ 95,696	$ 110,408