Property, Plant and Equipment, Net (Details) (USD $)	3 Months Ended		9 Months Ended			1 Months Ended	3 Months Ended														3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Facility closing	Mar. 31, 2013 Facility closing	Dec. 31, 2012 Facility closing	Sep. 30, 2013 Land	Dec. 31, 2012 Land	Sep. 30, 2012 Land	Sep. 30, 2013 Buildings and site improvements	Dec. 31, 2012 Buildings and site improvements	Sep. 30, 2012 Buildings and site improvements	Sep. 30, 2013 Leasehold improvements	Dec. 31, 2012 Leasehold improvements	Sep. 30, 2012 Leasehold improvements	Sep. 30, 2013 Machinery, equipment and software	Dec. 31, 2012 Machinery, equipment and software	Sep. 30, 2012 Machinery, equipment and software	Sep. 30, 2013 Software development	Sep. 30, 2013 Software development
Property, Plant and Equipment
Property, plant and equipment, gross	$ 433,294,000	$ 421,008,000	$ 433,294,000	$ 421,008,000	$ 425,224,000				$ 29,283,000	$ 32,068,000	$ 32,282,000	$ 177,484,000	$ 174,187,000	$ 170,761,000	$ 5,068,000	$ 4,747,000	$ 5,047,000	$ 221,459,000	$ 214,222,000	$ 212,918,000
Less accumulated depreciation and amortization	(232,958,000)	(215,562,000)	(232,958,000)	(215,562,000)	(217,868,000)
Property, plant and equipment excluding capital projects in progress, net	200,336,000	205,446,000	200,336,000	205,446,000	207,356,000
Capital projects in progress	9,305,000	5,686,000	9,305,000	5,686,000	6,096,000
Property, plant and equipment, net	209,641,000	211,132,000	209,641,000	211,132,000	213,452,000	1,700,000		2,800,000
Impairment loss on assets held and in use							1,000,000
Loss on sales of assets	631,000	33,000	634,000	42,000		700,000
Development costs incurred																					$ 1,600,000
Estimated useful life																						3 years