Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets
Allowance for credit losses	$ 53,349	$ 53,432
Loans	0	1,631
Deferred compensation	15,695	15,310
Net unrealized losses on securities	47,199	51,211
Impairment of assets	874	138
Tax credits	8,781	4,035
Net operating loss carryforwards	2	33
Investments in partnerships	77	1,491
Lease liabilities under operating leases	12,423	13,066
Realized losses on securities	0	4,892
Other	3,073	2,660
Total deferred tax assets	141,473	147,899
Deferred tax liabilities
Fixed assets	9,927	11,023
Mortgage servicing rights	15,841	21,282
Junior subordinated debt	1,452	1,708
Intangibles	3,652	2,447
Lease right-of-use asset	11,775	12,399
Loans	7,638	0
Other	4,153	3,344
Total deferred tax liabilities	54,438	52,203
Net deferred tax assets	$ 87,035	$ 95,696