Changes in Accumulated Other Comprehensive Income Balances (Schedule of Accumulated Other Comprehensive (Loss) Income ) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (1,035)
Other comprehensive (loss) income:
Change in net actuarial loss increase (decrease)	(19)	$ 1,419
Tax effect on change in net actuarial loss decrease	4	(298)
Unrealized holding gains arising during the period	(6,276)	2,832
Tax effect on unrealized gains arising during the period	1,318	(595)
Reclassification adjustment for gains included in net realized gains	(3,144)	(6,046)
Tax effect on reclassification adjustment for gains included in income tax expense	660	1,270
Other comprehensive loss, net of tax	(7,457)	(1,418)
Ending Balance	(8,492)	(1,035)
Pension Asset (Liability) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,641)	(3,762)
Other comprehensive (loss) income:
Change in net actuarial loss increase (decrease)	(19)	1,419
Tax effect on change in net actuarial loss decrease	4	(298)
Unrealized holding gains arising during the period	0	0
Tax effect on unrealized gains arising during the period	0	0
Reclassification adjustment for gains included in net realized gains	0	0
Tax effect on reclassification adjustment for gains included in income tax expense	0	0
Other comprehensive loss, net of tax	(15)	1,121
Ending Balance	(2,656)	(2,641)
Unrealized Gains (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,606	4,145
Other comprehensive (loss) income:
Change in net actuarial loss increase (decrease)	0	0
Tax effect on change in net actuarial loss decrease	0	0
Unrealized holding gains arising during the period	(6,276)	2,832
Tax effect on unrealized gains arising during the period	1,318	(595)
Reclassification adjustment for gains included in net realized gains	(3,144)	(6,046)
Tax effect on reclassification adjustment for gains included in income tax expense	660	1,270
Other comprehensive loss, net of tax	(7,442)	(2,539)
Ending Balance	(5,836)	1,606
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,035)	383
Other comprehensive (loss) income:
Change in net actuarial loss increase (decrease)	(19)	1,419
Tax effect on change in net actuarial loss decrease	4	(298)
Unrealized holding gains arising during the period	(6,276)	2,832
Tax effect on unrealized gains arising during the period	1,318	(595)
Reclassification adjustment for gains included in net realized gains	(3,144)	(6,046)
Tax effect on reclassification adjustment for gains included in income tax expense	660	1,270
Other comprehensive loss, net of tax	(7,457)	(1,418)
Ending Balance	$ (8,492)	$ (1,035)