Changes in Accumulated Other Comprehensive (Loss) Income Balances (Schedule of Accumulated Other Comprehensive (Loss) Income ) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 383
Other comprehensive loss:
Change in net actuarial gain	$ 43	$ 35	130	$ 104
Tax effect on change in net actuarial gain	(9)	(8)	(27)	(22)
Unrealized holding gains arising during the period	276	2,706	3,063	4,149
Tax effect on unrealized holding gains arising during the period	(58)	(568)	(643)	(872)
Reclassification adjustment for gains included in net income	(1,059)	(390)	(5,288)	(5,612)
Tax effect on reclassification adjustment for gains included in net income	222	82	1,110	1,179
Other comprehensive loss, net of tax	(585)	1,857	(1,655)	(1,074)
Ending Balance	(1,272)		(1,272)
Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(3,762)	(3,239)
Other comprehensive loss:
Change in net actuarial gain			130	104
Tax effect on change in net actuarial gain			(27)	(22)
Unrealized holding gains arising during the period			0	0
Tax effect on unrealized holding gains arising during the period			0	0
Reclassification adjustment for gains included in net income			0	0
Tax effect on reclassification adjustment for gains included in net income			0	0
Other comprehensive loss, net of tax			103	82
Ending Balance	(3,659)	(3,157)	(3,659)	(3,157)
Unrealized Gains (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			4,145	3,927
Other comprehensive loss:
Change in net actuarial gain			0	0
Tax effect on change in net actuarial gain			0	0
Unrealized holding gains arising during the period			3,063	4,149
Tax effect on unrealized holding gains arising during the period			(643)	(872)
Reclassification adjustment for gains included in net income			(5,288)	(5,612)
Tax effect on reclassification adjustment for gains included in net income			1,110	1,179
Other comprehensive loss, net of tax			(1,758)	(1,156)
Ending Balance	2,387	2,771	2,387	2,771
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			383	688
Other comprehensive loss:
Change in net actuarial gain			130	104
Tax effect on change in net actuarial gain			(27)	(22)
Unrealized holding gains arising during the period			3,063	4,149
Tax effect on unrealized holding gains arising during the period			(643)	(872)
Reclassification adjustment for gains included in net income			(5,288)	(5,612)
Tax effect on reclassification adjustment for gains included in net income			1,110	1,179
Other comprehensive loss, net of tax			(1,655)	(1,074)
Ending Balance	$ (1,272)	$ (386)	$ (1,272)	$ (386)