Accumulated Other Comprehensive Loss (Schedule of accumulated other comprehensive loss activity) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		$ 109,882	$ 59,277
Balance		$ 113,897	$ 102,849
Income tax rate		21.00%	21.00%
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	[1]	$ (4,104)	$ (7,012)
Other comprehensive gain (loss) before reclassifications	[1]	2,806	1,026
Amounts reclassified from accumulated other comprehensive loss	[1]	79	70
Period change	[1]	2,885	1,096
Balance	[1]	(1,219)	(5,916)
AOCL Defined Benefit Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	[1]	(3,909)	(2,576)
Other comprehensive gain (loss) before reclassifications	[1]	222	(15)
Amounts reclassified from accumulated other comprehensive loss	[1]	56	70
Period change	[1]	278	55
Balance	[1]	(3,631)	(2,521)
AOCL Unrealized gains (losses) on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	[1]	(195)	(4,436)
Other comprehensive gain (loss) before reclassifications	[1]	2,584	1,041
Amounts reclassified from accumulated other comprehensive loss	[1]	23
Period change	[1]	2,607	1,041
Balance	[1]	$ 2,412	$ (3,395)

[1] (1)   All amounts are net of tax. Related income tax expense or benefit is calculated using an income tax rate of 21.0%.