Net Periodic Pension Cost (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Periodic Pension Cost [Abstract]
Interest cost	$ 128	$ 129	$ 384	$ 388
Amortization of net loss	28	26	85	78
Expected return on plan assets	(162)	(175)	(485)	(526)
Net periodic pension cost	(6)	(20)	(16)	(60)
Contributed amount	$ 409		$ 409