Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Capital leases included in plant, property and equipment	$ 8,700	$ 16,000
Gross property, plant and equipment	1,757,486	1,916,469
Less: Accumulated depreciation	(1,267,231)	(1,352,434)
Property, plant and equipment, net	490,255	564,035	$ 663,244
Land
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	10,606	10,932
Land improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 15,032	15,277
Land improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	5 years
Land improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	20 years
Buildings and improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 185,657	191,356
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	40 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 1,525,156	1,661,914
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	20 years
Uncompleted construction
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 21,035	$ 36,990