Accumulated Other Comprehensive Loss (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income on taxable investment securities	$ 1,792			$ 1,587			$ 5,339	$ 4,533
Provision for income tax expense	(1,321)			(2,677)			(4,099)	(6,286)
Net income	4,513	$ 4,414	$ 4,375	6,936	$ 5,428	$ 5,715	13,302	18,079
Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(283)			(385)			(846)	(1,053)
OTTI | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income tax expense	(12)			(14)			(37)	(41)
Net income	39			37			115	111
OTTI | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Accretable Yield in Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income on taxable investment securities	51			51			152	152
Investment securities- all other [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income tax expense								(1)
Net income								2
Investment securities- all other [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Recognition of Gains (Losses) In Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gains								3
Investment Securities HTM [Member] | Recognition of Gains (Losses) In Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gains				93
Investment Securities HTM [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income tax expense	38			60			121	147
Net income	(129)			(167)			(392)	(404)
Investment Securities HTM [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Recognition of Gains (Losses) In Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gains								93
Investment Securities HTM [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income on taxable investment securities	(167)			(320)			(513)	(644)
Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Pension [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income tax expense	57			74			177	224
Net income	(194)			(205)			(573)	(613)
Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | SERP [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income tax expense	(1)			18			(2)	54
Net income	1			(50)			4	(149)
Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Loss [Member] | Pension [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense							(750)	(837)
Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Loss [Member] | SERP [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense	2			(68)			$ 6	$ (203)
Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Loss [Member] | Pension [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense	$ (251)			$ (279)