Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (127,087)	$ (139,974)
Change in Other comprehensive income (loss) before reclassification, Unrealized gains and Losses on available-for-sale Securities	(11,096)	14,238
Amount reclassified from accumulated other comprehensive income, unrealized gains and losses on available for-sale-Securities	73	147
Net current period other comprehensive income (loss)	(11,023)	14,385
Ending balance	(138,110)	(125,589)
Unrealized gains and (Losses) on available- for-sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(118,000)	(128,896)
Change in Other comprehensive income (loss) before reclassification, Unrealized gains and Losses on available-for-sale Securities	(11,096)	14,238
Net current period other comprehensive income (loss)	(11,096)	14,238
Ending balance	(129,096)	(114,658)
Retirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(9,087)	(11,078)
Amount reclassified from accumulated other comprehensive income, unrealized gains and losses on available for-sale-Securities	73	147
Net current period other comprehensive income (loss)	73	147
Ending balance	$ (9,014)	$ (10,931)