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Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Balance, Beginning		$ (28,863)
Balance, Ending	$ (28,468)		$ (28,863)
Investment securities- with OTTI [Member]
Balance, Beginning	(3,048)	(3,277)	(2,542)
Other comprehensive income/(loss) before reclassifications	1,581	266	(587)
Amounts reclassified from accumulated other comprehensive loss	(37)	(37)	(148)
Balance, Ending	(1,504)	(3,048)	(3,277)
Investment Securities -All Other AFS [Member]
Balance, Beginning	(5,227)	(25)	(853)
Other comprehensive income/(loss) before reclassifications	2,034	(5,202)	1,291
Amounts reclassified from accumulated other comprehensive loss	(113)		(463)
Balance, Ending	(3,306)	(5,227)	(25)
Investment Securities HTM [Member]
Balance, Beginning	(270)	(315)	(899)
Amounts reclassified from accumulated other comprehensive loss	34	45	584
Balance, Ending	(236)	(270)	(315)
Cash Flow Hedge (OCI) [Member]
Balance, Beginning	(549)	(954)	(85)
Other comprehensive income/(loss) before reclassifications	(34)	405	(869)
Balance, Ending	(583)	(549)	(954)
Pension Plan [Member]
Balance, Beginning	(22,497)	(22,630)	(20,417)
Other comprehensive income/(loss) before reclassifications	938	(139)	(3,262)
Amounts reclassified from accumulated other comprehensive loss	272	272	1,049
Balance, Ending	(21,287)	(22,497)	(22,630)
SERP [Member]
Balance, Beginning	(1,607)	(1,662)	(1,175)
Other comprehensive income/(loss) before reclassifications			(625)
Amounts reclassified from accumulated other comprehensive loss	55	55	138
Balance, Ending	(1,552)	(1,607)	(1,662)
Accumulated Other Comprehensive Loss [Member]
Balance, Beginning	(33,198)	(28,863)	(25,971)
Other comprehensive income/(loss) before reclassifications	4,519	(4,670)	(4,052)
Amounts reclassified from accumulated other comprehensive loss	211	335	1,160
Balance, Ending	$ (28,468)	$ (33,198)	$ (28,863)

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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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