Accumulated Other Comprehensive Loss ("AOCL") (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gains	$ 2,788	$ 334
Interest income on taxable investment securities	4,526	5,648
Tax (expense) benefit	(3,947)	(3,336)
Net income	13,841	13,129
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(1,160)	(958)
Investment securities- with OTTI [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income on taxable investment securities	202	200
Tax (expense) benefit	(54)	(54)
Net income	148	146
Investment Securities -All Other AFS [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gains	632
Tax (expense) benefit	(169)
Net income	463
Investment Securities HTM [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income on taxable investment securities	(798)	(317)
Tax (expense) benefit	214	85
Net income	(584)	(232)
Pension Plan [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax (expense) benefit	384	288
Net income	(1,049)	(789)
Pension Plan [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of Unrecognized Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense	(1,433)	(1,077)
SERP [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax (expense) benefit	50	30
Net income	(138)	(83)
SERP [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of Unrecognized Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense	$ (188)	(116)
SERP [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of Prior Service Costs [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense		$ 3