Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Before Tax Amount
Income (loss) before tax amount		$ 27,557	$ 25,556
Net unrealized gains (losses) on available-for-sale investment securities, before tax amount
Net unrealized holding gains (losses) arising during the period		7,160	(2,989)
(Reversal of provision) provision for credit losses		(93)	86
Other comprehensive income (loss), securities, available-for-sale, adjustment, before tax		7,067	(2,903)
Net unrealized gains (losses) on interest rate swaps used in cash flow hedges, before tax amount
Interest rate swap—cash flow hedge—net interest payments		0	(4,013)
Less: reclassification adjustment for net losses realized in net income		0	1,586
Reclassification adjustment included in earnings	[1]	565
Total net unrealized gains (losses) on interest rate swaps used in cash flow hedges		565	(2,427)
Defined benefit pension plans, Before Tax Amount
Amortization of net actuarial loss included in net periodic pension costs	[2]	52	147
Total defined benefit pension plans		52	147
Other comprehensive income (loss), before tax amount		7,684	(5,183)
Total comprehensive income (loss), before tax amount		35,241	20,373
Tax Expense (Benefit)
Income tax expense		5,162	5,251
Net unrealized gains (losses) on interest rate swaps used in cash flow hedges, before tax expense (benefit)
Net unrealized holding gains (losses) arising during the period		1,504	(628)
(Reversal of provision) provision for credit losses		(20)	18
Total net unrealized gains (losses) on available-for-sale investment securities		1,484	(610)
Net unrealized gains (losses) on interest rate swaps used in cash flow hedges, tax expense (benefit)
Net unrealized holding losses arising during the period		0	(843)
Less: reclassification adjustment for net losses realized in net income		0	333
Reclassification adjustment recorded in earnings	[1]	119
Total net unrealized gains (losses) on interest rate swaps used in cash flow hedges		119	(510)
Defined benefit pension plans, tax expense (benefit)
Amortization of net actuarial loss included in net periodic pension costs	[2]	11	31
Other comprehensive (income) loss, defined benefit plan, after reclassification adjustment, tax		11	31
Other comprehensive income (loss), tax expense (benefit)		1,614	(1,089)
Total comprehensive income (loss), tax expense (benefit)		6,776	4,162
Net of Tax Amount
Net income		22,395	20,305
Net unrealized gains (losses) on available-for-sale investment securities, net of tax amount
Net unrealized holding gains (losses) arising during the period		5,656	(2,361)
Recovery of provision for credit losses, after tax		(73)	68
Other comprehensive income (loss), securities, available-for-sale, adjustment, after tax		5,583	(2,293)
Net unrealized gains (losses) on interest rate swaps used in cash flow hedges, net of tax amount
Net unrealized holding losses arising during the period		0	(3,170)
Less: reclassification adjustment for net losses realized in net income		0	1,253
Reclassification adjustment recorded in earnings	[1]	446
Total net unrealized gains (losses) on interest rate swaps used in cash flow hedges		446	(1,917)
Defined benefit pension plans, net of tax amount
Amortization of net actuarial loss included in net periodic pension costs	[2]	41	116
Other comprehensive (income) loss, defined benefit plan, after reclassification adjustment, after tax		41	116
Other comprehensive income (loss), net of tax amount		6,070	(4,094)
Total comprehensive income (loss), net of tax amount		$ 28,465	$ 16,211

[1] Represents reclassification to earnings as a reduction to interest income of amounts included in accumulated other comprehensive income on the condensed consolidated balance sheet related to the interest rate swap terminated on August 2, 2024.

[2] These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (before tax amount). See Note 8, "Retirement Plans and Other Postretirement Benefits" for additional details.