Accumulated Other Comprehensive Loss (Reclassifications out of Accumulated Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Equity [Abstract]
Prior service cost	$ (6)	$ 13
Amortization of actuarial loss	157	191
Total before tax	151	204
Income tax benefit	(55)	(73)
Amount reclassified out of accumulated other comprehensive loss	$ 96	$ 131