Comprehensive Income - Changes in Accumulated Other Comprehensive Income By Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 431,852	$ 400,901
Other comprehensive income or loss before reclassifications	(908)	5,262
Amounts reclassified from accumulated other comprehensive income or loss	181	(329)
Other Comprehensive (Loss) Income	(727)	4,933
Ending balance	440,143	404,409
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(4,037)	(18,453)
Other Comprehensive (Loss) Income	(727)	4,933
Ending balance	(4,764)	(13,520)
Unrealized Loss on Available-for-Sale Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(12,799)	(27,292)
Other comprehensive income or loss before reclassifications	(1,810)	6,416
Amounts reclassified from accumulated other comprehensive income or loss	0	0
Other Comprehensive (Loss) Income	(1,810)	6,416
Ending balance	(14,609)	(20,876)
Net Unrealized (Loss) Gain on Cash Flow Swap
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	2,475	4,677
Other comprehensive income or loss before reclassifications	902	(1,154)
Amounts reclassified from accumulated other comprehensive income or loss	216	(319)
Other Comprehensive (Loss) Income	1,118	(1,473)
Ending balance	3,593	3,204
Net Actuarial Gain
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	6,807	4,927
Other comprehensive income or loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income or loss	(87)	(71)
Other Comprehensive (Loss) Income	(87)	(71)
Ending balance	6,720	4,856
Net Prior Service Cost
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(520)	(765)
Other comprehensive income or loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income or loss	52	61
Other Comprehensive (Loss) Income	52	61
Ending balance	$ (468)	$ (704)