Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 6,253	$ 6,895
Available-for-sale debt securities:
Unrealized holding gains (losses) on available-for-sale debt securities	8,993	(32,025)
Reclassification adjustment for gains realized in income	(7)	(2)
Other comprehensive income (loss) on available-for-sale debt securities	8,986	(32,027)
Unfunded pension and postretirement obligations:
Changes from plan amendments and actuarial gains and losses	(8)	133
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost	(14)	(11)
Other comprehensive (loss) income on pension and postretirement obligations	(22)	122
Other comprehensive income (loss) before income tax	8,964	(31,905)
Income tax related to other comprehensive (income) loss	(1,883)	6,701
Net other comprehensive income (loss)	7,081	(25,204)
Comprehensive income (loss)	$ 13,334	$ (18,309)