Property, Plant and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,240,874,000	$ 1,201,671,000
Accumulated depreciation	(822,044,000)	(781,517,000)
Property, plant and equipment, net	418,830,000	420,154,000	438,953,000
Expenditures for maintenance and repairs	17,500,000	17,000,000	20,000,000
Depreciation expense	57,182,000	56,769,000	57,502,000
Software amortization	6,000,000	5,800,000	5,800,000
Capital expenditures and purchased software	64,457,000	37,207,000	27,428,000
Unamortized software cost	19,200,000	22,400,000
Continuing Operations [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	57,000,000	56,600,000	56,100,000
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	27,081,000	26,985,000
Estimated useful life	25 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	240,849,000	244,104,000
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	25 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	903,037,000	863,811,000
Estimated useful life	10 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,818,000	7,249,000
Estimated useful life	5 years
Computer and Other Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	12,843,000	11,946,000
Computer and Other Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Computer and Other Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 50,246,000	$ 47,576,000
Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	8 years