Accumulated Other Comprehensive Loss (Schedule of accumulated other comprehensive loss activity) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 107,463	$ 113,341	$ 108,132	$ 125,969
Balance	$ 106,672	$ 106,802	$ 106,672	$ 106,802
Income tax rate	21.00%	21.00%	21.00%	21.00%
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (33,462)	$ (23,761)	$ (32,189)	$ (6,635)
Other comprehensive gain (loss) before reclassifications	(2,008)	(8,800)	(3,133)	(26,160)
Amounts reclassified from accumulated other comprehensive loss	(73)	58	(221)	292
Period change	(2,081)	(8,742)	(3,354)	(25,868)
Balance	(35,543)	(32,503)	(35,543)	(32,503)
Defined Benefit Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(4,452)	(4,563)	(3,997)	(3,901)
Other comprehensive gain (loss) before reclassifications	227	42	(80)	(726)
Amounts reclassified from accumulated other comprehensive loss	(73)	52	(221)	158
Period change	154	94	(301)	(568)
Balance	(4,298)	(4,469)	(4,298)	(4,469)
Unrealized (losses) gains on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(29,010)	(19,198)	(28,192)	(2,734)
Other comprehensive gain (loss) before reclassifications	(2,235)	(8,842)	(3,053)	(25,434)
Amounts reclassified from accumulated other comprehensive loss		6		134
Period change	(2,235)	(8,836)	(3,053)	(25,300)
Balance	$ (31,245)	$ (28,034)	$ (31,245)	$ (28,034)