Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Consolidated Statements of Comprehensive Income (Loss)
Net Income (Loss)	$ 24,148	$ 26,618	$ 30,554
Available-for-sale debt securities:
Unrealized holding gains (losses) on available-for-sale debt securities	11,512	(69,828)	(8,669)
Reclassification adjustment for losses (gains) realized in income	3,036	(20)	(24)
Other comprehensive income (loss) on available-for-sale debt securities	14,548	(69,848)	(8,693)
Unfunded pension and postretirement obligations:
Changes from plan amendments and actuarial gains and losses	(9)	389	140
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost	(56)	(42)	(17)
Other comprehensive (loss) income on pension and postretirement obligations	(65)	347	123
Other comprehensive income (loss) before income tax	14,483	(69,501)	(8,570)
Income tax related to other comprehensive (income) loss	(3,042)	14,597	1,801
Net other comprehensive income (loss)	11,441	(54,904)	(6,769)
Comprehensive income (loss)	$ 35,589	$ (28,286)	$ 23,785