Comprehensive Income - Changes in Accumulated Other Comprehensive Income By Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 400,901	$ 379,772
Other comprehensive income or loss before reclassifications	5,262	860
Amounts reclassified from accumulated other comprehensive income or loss	(329)	(158)
Other Comprehensive Income	4,933	702
Ending balance	404,409	377,986
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(18,453)	(33,416)
Other Comprehensive Income	4,933	702
Ending balance	(13,520)	(32,714)
Unrealized Loss on Available-for-Sale Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(27,292)	(31,648)
Other comprehensive income or loss before reclassifications	6,416	(1,530)
Amounts reclassified from accumulated other comprehensive income or loss	0	0
Other Comprehensive Income	6,416	(1,530)
Ending balance	(20,876)	(33,178)
Unrealized Gain on Cash Flow Swap
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	4,677	1,711
Other comprehensive income or loss before reclassifications	(1,154)	2,390
Amounts reclassified from accumulated other comprehensive income or loss	(319)	(158)
Other Comprehensive Income	(1,473)	2,232
Ending balance	3,204	3,943
Net Actuarial Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	4,927	(2,839)
Other comprehensive income or loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income or loss	(71)	(50)
Other Comprehensive Income	(71)	(50)
Ending balance	4,856	(2,889)
Net Prior Service Cost
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(765)	(640)
Other comprehensive income or loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income or loss	61	50
Other Comprehensive Income	61	50
Ending balance	$ (704)	$ (590)