Accumulated Other Comprehensive Loss (Schedule of accumulated other comprehensive loss activity) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 110,717	$ 117,293	$ 108,132	$ 125,969
Balance	$ 107,463	$ 113,341	$ 107,463	$ 113,341
Income tax rate	21.00%	21.00%	21.00%	21.00%
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (29,968)	$ (17,574)	$ (32,189)	$ (6,635)
Other comprehensive loss before reclassifications	(3,346)	(6,421)	(1,125)	(17,360)
Amounts reclassified from accumulated other comprehensive loss	(148)	234	(148)	234
Period change	(3,494)	(6,187)	(1,273)	(17,126)
Balance	(33,462)	(23,761)	(33,462)	(23,761)
Defined Benefit Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(3,997)	(3,901)	(3,997)	(3,901)
Other comprehensive loss before reclassifications	(307)	(768)	(307)	(768)
Amounts reclassified from accumulated other comprehensive loss	(148)	106	(148)	106
Period change	(455)	(662)	(455)	(662)
Balance	(4,452)	(4,563)	(4,452)	(4,563)
Unrealized (losses) gains on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(25,971)	(13,673)	(28,192)	(2,734)
Other comprehensive loss before reclassifications	(3,039)	(5,653)	(818)	(16,592)
Amounts reclassified from accumulated other comprehensive loss		128		128
Period change	(3,039)	(5,525)	(818)	(16,464)
Balance	$ (29,010)	$ (19,198)	$ (29,010)	$ (19,198)