Restructuring, Impairment and Other Charges - Restructuring Charges By Statement of Income Account (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of restructuring and related costs
Restructuring Charges	$ 2,462	$ 1,437	$ 4,902	$ 17,723
Cost Of Sales Services [Member]
Schedule of restructuring and related costs
Restructuring Charges	956	(1,331)	91	7,298
Cost Of Sales Products [Member]
Schedule of restructuring and related costs
Restructuring Charges	(2,064)	630	(1,959)	1,004
Selling and Administrative Expense [Member]
Schedule of restructuring and related costs
Restructuring Charges	2,454	2,131	5,654	9,402
Research and Development Expense [Member]
Schedule of restructuring and related costs
Restructuring Charges	$ 1,116	$ 7	$ 1,116	$ 19