Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 549,041	$ 527,976
Balance	571,945	520,766
Unrealized gains and (Losses) on available- for-sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(127,807)	(118,000)
Change in Other comprehensive income (loss) before reclassification, Unrealized gains and Losses on available-for-sale Securities	11,100	(11,096)
Net current period other comprehensive income (loss)	11,100	(11,096)
Balance	(116,707)	(129,096)
Retirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(4,478)	(9,087)
Amount reclassified from accumulated other comprehensive income, unrealized gains and losses on available for-sale-Securities	3	73
Net current period other comprehensive income (loss)	3	73
Balance	(4,475)	(9,014)
Accumulated Other Comprehensive Income/(Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(132,285)	(127,087)
Change in Other comprehensive income (loss) before reclassification, Unrealized gains and Losses on available-for-sale Securities	11,100	(11,096)
Amount reclassified from accumulated other comprehensive income, unrealized gains and losses on available for-sale-Securities	3	73
Net current period other comprehensive income (loss)	11,103	(11,023)
Balance	$ (121,182)	$ (138,110)