FIXED ASSETS, NET (Schedule of Fixed Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,491,384	$ 1,485,705
Less: Accumulated depreciation and amortization	(1,333,103)	(1,300,722)
Property, Plant and Equipment, Net	158,281	184,983
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	11,370	11,464
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	516,643	519,114
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	934,951	918,093
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	18,620	19,794
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 9,800	$ 17,240