Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Property and Equipment [Abstract]
Accumulated depreciation	$ 215,961	$ 215,961	$ 222,001
Carrying value of the assets reclassified as held for sale	9,283	9,283
Costs related to facility closing	$ 634	$ 1,500