Income Taxes - Significant Components of Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets:
Allowance for loan losses and other reserves	$ 24,465	$ 23,421
Net unrealized holding losses on securities available-for-sale	17,452	21,843
Lease liabilities	10,572	10,767
State net operating loss carryforwards	3,464	5,924
Net unrealized losses on interest rate swaps	3,137	4,562
Cumulative adjustment to funded status of pension	3,987	4,029
Low income housing partnerships and other investments	174	2,692
Other employee benefits	3,740	4,181
Capital loss carryforward	2,092	2
Other	1,202	549
Deferred Tax Assets	70,285	77,970
Less: Valuation allowance	(3,464)	(5,924)
Total Deferred Tax Assets	66,821	72,046
Deferred Tax Liabilities:
Right-of-use lease assets	(9,127)	(9,385)
Deferred loan income, net	(4,633)	(4,533)
Prepaid pension	(3,360)	(3,706)
Purchase accounting adjustments	(1,823)	(1,945)
Depreciation on premises and equipment	(1,182)	(629)
Other	(1,428)	(240)
Total Deferred Tax liabilities	(21,553)	(20,438)
Net Deferred Tax Asset	$ 45,268	$ 51,608