Other Comprehensive Income - Schedule of Components of Other Comprehensive Income and Related Tax Effects (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income	$ 12,908	$ 2,505	$ 6,442
Unrealized gain (loss) on available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassifications	18,263	2,245	7,785
Reclassifications	(1,168)	(74)	(52)
Net unrealized gains (losses)	17,095	2,171	7,733
Tax effect	(3,591)	(456)	(1,624)
Total other comprehensive income	13,504	1,715	6,109
Unrealized gain (loss) from held-to-maturity securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gains (losses)	601	690	748
Tax effect	(126)	(145)	(157)
Total other comprehensive income	475	545	591
Unrealized gains (losses) on postretirement benefits plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassifications	(383)	478	(2)
Reclassifications	(257)	(168)	(174)
Net unrealized gains (losses)	(640)	310	(176)
Tax effect	134	(65)	37
Total other comprehensive income	(506)	245	(139)
Unrealized gains (losses) on pension plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gains (losses)	(715)	0	0
Tax effect	150	0	0
Total other comprehensive income	(565)	0	0
Unrealized gains (losses) on interest rate swap
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before reclassifications	0	0	0
Reclassifications	0	0	(151)
Net unrealized gains (losses)	0	0	(151)
Tax effect	0	0	32
Total other comprehensive income	$ 0	$ 0	$ (119)