Change in Accumulated Other Comprehensive Income (Changes To Accumulated Other Comprehensive Income By Components) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (1,553)	$ 310
Other comprehensive income (loss) before reclassifications	2,137	(3,271)
Reclassification adjustments	3	(11)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	1	2
Tax effect of current period changes	(450)	689
Total other comprehensive income (loss)	1,690	(2,593)
Ending balance	137	(2,283)
Unrealized Gains And Losses On Available For Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,597)	266
Other comprehensive income (loss) before reclassifications	2,137	(3,271)
Reclassification adjustments	3	(11)
Tax effect of current period changes	(450)	689
Total other comprehensive income (loss)	1,690	(2,593)
Ending balance	93	(2,327)
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
Ending balance	$ 44	$ 44