Restructuring and Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring and Other Expense [Line Items]
Restructuring costs			$ 3,979
Completion period	6 months
Cost of Sales [Member] | Facility Consolidation Costs [Member]
Restructuring and Other Expense [Line Items]
Restructuring costs	$ 1,534	$ 1,358	3,863	$ 2,306
Selling and Administrative Expenses [Member]
Restructuring and Other Expense [Line Items]
Restructuring costs	2,284	494	8,464	1,207
Patent dispute and other matters	0	1,410	0	3,304
Shareholder activism costs	0	935	0	1,525
Restructuring and other expense included in selling and administrative expense	2,284	2,839	8,464	6,036
Selling and Administrative Expenses [Member] | Patent Infringement [Member]
Restructuring and Other Expense [Line Items]
Patent dispute and other matters		0		1,900
Settlement costs				900
Selling and Administrative Expenses [Member] | Legal Fees [Member]
Restructuring and Other Expense [Line Items]
Patent dispute and other matters		1,400		1,400
Selling and Administrative Expenses [Member] | Administrative Restructuring [Member]
Restructuring and Other Expense [Line Items]
Restructuring costs	$ 2,300	$ 500	$ 8,500	$ 1,200