Changes in Accumulated Other Comprehensive (Loss) Income Balances (Schedule of Accumulated Other Comprehensive (Loss) Income ) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 383
Other comprehensive (loss) income:
Change in net actuarial gain	43	$ 34
Tax effect on change in net actuarial gain	(9)	(7)
Unrealized holding gains (losses) arising during the period	585	(6,987)
Tax effect on unrealized holding (gains) losses arising during the period	(123)	1,467
Reclassification adjustment for gains included in net income (loss)	(1,403)	(5,636)
Tax effect on reclassification adjustment for gains included in net income (loss)	295	1,184
Other comprehensive loss, net of tax	(612)	(9,945)
Ending Balance	(229)
Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(3,762)	(3,239)
Other comprehensive (loss) income:
Change in net actuarial gain	43	34
Tax effect on change in net actuarial gain	(9)	(7)
Other comprehensive loss, net of tax	34	27
Ending Balance	(3,728)	(3,212)
Unrealized Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	4,145	3,927
Other comprehensive (loss) income:
Unrealized holding gains (losses) arising during the period	585	(6,987)
Tax effect on unrealized holding (gains) losses arising during the period	(123)	1,467
Reclassification adjustment for gains included in net income (loss)	(1,403)	(5,636)
Tax effect on reclassification adjustment for gains included in net income (loss)	295	1,184
Other comprehensive loss, net of tax	(646)	(9,972)
Ending Balance	3,499	(6,045)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	383	688
Other comprehensive (loss) income:
Change in net actuarial gain	43	34
Tax effect on change in net actuarial gain	(9)	(7)
Unrealized holding gains (losses) arising during the period	585	(6,987)
Tax effect on unrealized holding (gains) losses arising during the period	(123)	1,467
Reclassification adjustment for gains included in net income (loss)	(1,403)	(5,636)
Tax effect on reclassification adjustment for gains included in net income (loss)	295	1,184
Other comprehensive loss, net of tax	(612)	(9,945)
Ending Balance	$ (229)	$ (9,257)