Net Periodic Pension Cost (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Periodic Pension Cost [Abstract]
Interest cost	$ 113	$ 106	$ 340	$ 318
Amortization of net loss	36	26	108	79
Expected return on plan assets	(149)	(173)	(448)	(520)
Net periodic pension cost		(41)		(123)
Contributed amount	$ 500		$ 500