Components of Net Periodic Pension Cost (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Average daily balance during the year
Service cost
Interest cost	71	91
Expected return on plan assets	(213)	(196)
Net amortization	75	75
Total periodic pension (income) cost	$ (67)	$ (30)