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Change in Accumulated Other Comprehensive Income (Changes To Accumulated Other Comprehensive Income By Components) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 3,279	$ 1,482
Other comprehensive income before reclassifications	(2,699)	3,565
Reclassifications	(76)
Tax effect of current period changes	582	(749)
Total other comprehensive (loss) income	(2,193)	2,816
Ending balance	1,086	4,298
Unrealized Gains And Losses On Available For Sale Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	3,260	1,438
Other comprehensive income before reclassifications	(2,699)	3,565
Reclassifications	(76)	0
Tax effect of current period changes	582	(749)
Total other comprehensive (loss) income	(2,193)	2,816
Ending balance	1,067	4,254
Change In Benefit Obligations And Plan Assets For The Post Retirement Benefit Plan [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	19	44
Ending balance	$ 19	$ 44

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Other Comprehensive Income (Loss), Tax Effect Of Current Period Changes

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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