Financial Instruments (Details) (USD $)						12 Months Ended
	Dec. 31, 2012 Forward Contracts [Member]	Dec. 30, 2011 Forward Contracts [Member]	Oct. 06, 2005 Interest Rate Swap [Member]	Dec. 31, 2012 Accrued Liabilities [Member] Forward Contracts [Member] Fair Value, Inputs, Level 2	Dec. 30, 2011 Other current assets Forward Contracts [Member] Fair Value, Inputs, Level 2	Dec. 31, 2012 Interest Expense [Member] Interest Rate Swap [Member]	Dec. 30, 2011 Interest Expense [Member] Interest Rate Swap [Member]	Dec. 31, 2010 Interest Expense [Member] Interest Rate Swap [Member]	Dec. 31, 2012 Other Income [Member] Foreign Exchange Forward [Member]	Dec. 30, 2011 Other Income [Member] Foreign Exchange Forward [Member]	Dec. 31, 2010 Other Income [Member] Foreign Exchange Forward [Member]	Dec. 31, 2012 Other Income [Member] Forward Contracts [Member]	Dec. 30, 2011 Other Income [Member] Forward Contracts [Member]	Dec. 31, 2012 Senior Notes [Member] Senior Secured Notes [Member]	Dec. 30, 2011 Senior Notes [Member] Senior Secured Notes [Member]	Mar. 18, 2011 Senior Notes [Member] Senior Secured Notes [Member]	Dec. 31, 2012 Senior Notes [Member] Senior Secured Notes [Member] Fair Value, Inputs, Level 2	Dec. 30, 2011 Senior Notes [Member] Senior Secured Notes [Member] Fair Value, Inputs, Level 2
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Loss												$ (300,000)
Derivative Instruments Not Designated as Hedging Instruments, Gain													600,000
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value				(200,000)
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value					600,000
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	9,000,000	9,700,000
Derivative, Fixed Interest Rate			4.623%
Derivative, Notional Amount			375,000,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, gross						0	0	4,287,000
Derivative instruments gain loss recognized in income before tax									289,000	(613,000)	0
Debt instrument, face amount														375,000,000	375,000,000	375,000,000
Long-term Debt, Fair Value																	$ 348,800,000	$ 294,400,000