Change in Accumulated Other Comprehensive Income (Changes To Accumulated Other Comprehensive Income By Components) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 3,937		$ 1,482	$ 1,441		$ (1,553)	$ 1,482	$ (1,553)
Other comprehensive (loss) income before reclassifications	(215)			267			3,421	4,054
Reclassification adjustments	(158)			4			(687)	7
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	78			(57)			(574)	(853)
Total other comprehensive (loss) income	(295)	$ (361)	2,816	214	$ 1,304	1,690	2,160	3,208
Ending balance	3,642	3,937		1,655	1,441		3,642	1,655
Unrealized Gains And Losses On Available For Sale Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	3,893		1,438	1,397		(1,597)	1,438	(1,597)
Other comprehensive (loss) income before reclassifications	(215)			267			3,421	4,054
Reclassification adjustments	(158)			4			(687)	7
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	78			(57)			(574)	(853)
Total other comprehensive (loss) income	(295)			214			2,160	3,208
Ending balance	3,598	3,893		1,611	1,397		3,598	1,611
Change In Benefit Obligations And Plan Assets For The Post Retirement Benefit Plan [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	44		$ 44	44		$ 44	44	44
Ending balance	$ 44	$ 44		$ 44	$ 44		$ 44	$ 44