Employee Benefits (Schedule of net periodic pension (benefit) cost and amounts recognized in other comprehensive income (loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Employee Benefits and Share-based Compensation, Noncash [Abstract]
Interest cost	$ 734	$ 689
Expected return on plan assets	(868)	(1,074)
Amortization of unrecognized loss	345	374
Net periodic cost (benefit)	$ 211	$ (11)