Restructuring Expenses and Other Exit Costs (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Changes in liabilities related to restructuring expenses and other exit costs
Beginning Balance	$ 9,160	$ 3,582
Restructuring charges for the period	6,006	6,463
Cash reductions Settled with cash	(4,206)	(1,665)
Non-cash changes and foreign currency effects	65	88
Ending Balance	$ 11,025	$ 8,468