Other Charges, Net (Details) (USD $)	12 Months Ended									12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Berlin program	Dec. 31, 2010 Herzogenrath Program	Dec. 31, 2012 Additional restructuring charges Berlin program	Dec. 31, 2011 Provisions for Excess Inventory Berlin program	Dec. 31, 2010 Severance	Dec. 31, 2011 Severance	Dec. 31, 2011 Severance Berlin program	Dec. 31, 2010 Severance Herzogenrath Program	Dec. 31, 2012 Severance Additional restructuring charges Berlin program	Dec. 31, 2011 Exit Costs Berlin program	Dec. 31, 2012 Exit Costs Additional restructuring charges Berlin program
Other Charges, Net
Acquisition-related charges	$ 1,200,000	$ 1,800,000	$ 800,000
Transition-related charges incurred in connection with acquired businesses	3,000,000	2,800,000
Gain on bargain purchase			(1,300,000)
Professional fees incurred in connection with the internal investigation	4,300,000
Restructuring charges	1,000,000	200,000	200,000	1,300,000	200,000	700,000	300,000			900,000	200,000	400,000	100,000	300,000
Loss on divestiture of business		1,000,000
Impairment charges			700,000
Other charges, net	200,000
Other charges	9,700,000	5,800,000	400,000
Changes in reserves for restructuring charges
Balance at beginning of period									900,000
Restructuring charges	1,000,000	200,000	200,000	1,300,000	200,000	700,000	300,000			900,000	200,000	400,000	100,000	300,000
Cash payments		(200,000)						(200,000)
Balance at end of period	$ 1,300,000								$ 900,000