Accumulated Other Comprehensive Loss ("AOCL") (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance, Beginning	$ (25,971)
Balance, Ending	(28,863)	$ (25,971)
Investment securities- with OTTI [Member]
Balance, Beginning	(2,542)	(1,899)
Other comprehensive income/(loss) before reclassifications	(587)	(497)
Amounts reclassified from accumulated other comprehensive loss	(148)	(146)
Balance, Ending	(3,277)	(2,542)
Investment Securities -All Other AFS [Member]
Balance, Beginning	(853)	(3,601)
Other comprehensive income/(loss) before reclassifications	1,291	2,748
Amounts reclassified from accumulated other comprehensive loss	(463)
Balance, Ending	(25)	(853)
Investment Securities HTM [Member]
Balance, Beginning	(899)	(1,131)
Amounts reclassified from accumulated other comprehensive loss	584	232
Balance, Ending	(315)	(899)
Cash Flow Hedge (OCI) [Member]
Balance, Beginning	(85)	773
Other comprehensive income/(loss) before reclassifications	(869)	(858)
Balance, Ending	(954)	(85)
Pension Plan [Member]
Balance, Beginning	(20,417)	(18,017)
Other comprehensive income/(loss) before reclassifications	(3,262)	(3,189)
Amounts reclassified from accumulated other comprehensive loss	1,049	789
Balance, Ending	(22,630)	(20,417)
SERP [Member]
Balance, Beginning	(1,175)	(528)
Other comprehensive income/(loss) before reclassifications	(625)	(730)
Amounts reclassified from accumulated other comprehensive loss	138	83
Balance, Ending	(1,662)	(1,175)
Accumulated Other Comprehensive Loss, Net of Tax [Member]
Balance, Beginning	(25,971)	(24,403)
Other comprehensive income/(loss) before reclassifications	(4,052)	(2,526)
Amounts reclassified from accumulated other comprehensive loss	1,160	958
Balance, Ending	$ (28,863)	$ (25,971)