Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Balance	$ 155,156	$ 152,868	$ 151,793	$ 132,892	$ 151,793	$ 141,900	$ 141,900
Balance	154,990	155,156	152,868	132,044	154,990	132,044	151,793
Investment securities- with OTTI [Member]
Balance	(2,857)	(2,928)	(1,711)		(1,711)	(949)	(949)
Other comprehensive income/(loss) before reclassifications	475	111	(1,180)	(146)	(594)	(625)	(614)
Amounts reclassified from accumulated other comprehensive loss	(38)	(40)	(37)				(148)
Balance	(2,420)	(2,857)	(2,928)		(2,420)		(1,711)
Investment securities- all other [Member]
Other comprehensive income/(loss) before reclassifications				(4,957)		(16,824)
Investment securities- all other - excluding transfers [Member]
Balance	(17,049)	(15,395)	(16,380)		(16,380)	(5,749)	(5,749)
Other comprehensive income/(loss) before reclassifications	(3,201)	(1,654)	985				(10,629)
Amounts reclassified from accumulated other comprehensive loss							(2)
Balance	(20,250)	(17,049)	(15,395)		(20,250)		(16,380)
Investment Securities HTM [Member]
Balance	(5,441)	(5,570)	(5,703)		(5,703)	(134)	(134)
Other comprehensive income/(loss) before reclassifications						(6,100)	(6,120)
Amounts reclassified from accumulated other comprehensive loss	130	129	133				551
Balance	(5,311)	(5,441)	(5,570)		(5,311)		(5,703)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	809	659	797		797	(319)	(319)
Other comprehensive income/(loss) before reclassifications	11	150	(138)				1,116
Balance	820	809	659		820		797
Adjustment [Member] | Pension [Member]
Balance	(16,143)	(16,296)	(16,603)		(16,603)	(18,108)	(18,108)
Other comprehensive income/(loss) before reclassifications	(1,033)	(42)	123	(2,592)	(952)	(10,312)	684
Amounts reclassified from accumulated other comprehensive loss	194	195	184				821
Balance	(16,982)	(16,143)	(16,296)		(16,982)		(16,603)
Adjustment [Member] | SERP [Member]
Balance	571	573	574		574	(2,055)	(2,055)
Other comprehensive income/(loss) before reclassifications							2,430
Amounts reclassified from accumulated other comprehensive loss	(1)	(2)	(1)				199
Balance	570	571	573		570		574
Accumulated Other Comprehensive Loss [Member]
Balance	(40,110)	(38,957)	(39,026)	(45,916)	(39,026)	(27,314)	(27,314)
Other comprehensive income/(loss) before reclassifications	(3,748)	(1,435)	(210)				(13,133)
Amounts reclassified from accumulated other comprehensive loss	285	282	279				1,421
Balance	$ (43,573)	$ (40,110)	$ (38,957)	$ (52,834)	$ (43,573)	$ (52,834)	$ (39,026)