Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for credit losses	$ 12,387	$ 11,160
Lease liability	8,535	7,277
Interest income on nonperforming loans	503	470
Compensation and benefits	12,316	12,303
Purchase accounting adjustments	517	360
Liabilities held at fair value	56	21
Deferred loan fees and costs	1,053	1,664
Other	593	1,017
Total	35,960	34,272
Deferred tax liabilities:
Prepaid pension	11,528	10,875
Right of use asset	8,222	7,092
Depreciation	3,767	3,586
Intangibles	1,489	1,401
Leases	2,617	1,985
Other	1,571	1,657
Total deferred tax liabilities	29,194	26,596
Net deferred tax asset at year-end	6,766	7,676	$ 9,474
Net deferred tax asset at beginning of year	7,676	9,474
Decrease in net deferred tax asset	(910)	(1,798)
Deferred tax expense	$ 910	$ 1,798	$ (6,284)