Property and Equipment (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Oct. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Property and Equipment [Abstract]
Accumulated depreciation			$ 213,648	$ 222,001
Loudon Facility [Member]
Long Lived Assets Held-for-sale [Line Items]
Carrying value of the assets reclassified as held for sale			$ 9,248
Costs related to facility closing	$ 1,500
Loudon Facility [Member] | Cost of Sales [Member]
Long Lived Assets Held-for-sale [Line Items]
Costs related to facility closing	999
Loudon Facility [Member] | Selling, General and Administrative Expenses [Member]
Long Lived Assets Held-for-sale [Line Items]
Costs related to facility closing	$ 501
Loudon Facility [Member] | Subsequent Event [Member]
Long Lived Assets Held-for-sale [Line Items]
Net sales price of facility		$ 9,599