Net Periodic Pension Cost (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Periodic Pension Cost [Abstract]
Interest cost	$ 128	$ 129
Amortization of net loss	28	26
Expected return on plan assets	(161)	(175)
Net periodic pension cost	$ (5)	$ (20)