Fair Value Measurement, Financial Instruments and Risk Management (Narrative) (Details)	3 Months Ended		6 Months Ended		12 Months Ended			3 Months Ended	6 Months Ended
	Jun. 26, 2011 USD ($)	Jun. 27, 2010 USD ($)	Jun. 26, 2011 USD ($)	Jun. 27, 2010 USD ($)	Dec. 26, 2010 USD ($)	Jun. 26, 2011 Foreign Currency Forward Exchange Contracts [Member] USD ($)	Dec. 26, 2010 Foreign Currency Forward Exchange Contracts [Member] USD ($)	Jun. 26, 2011 Foreign Currency Revenue Forecast Contracts [Member] USD ($)	Jun. 26, 2011 Foreign Currency Revenue Forecast Contracts [Member] USD ($)	Jun. 26, 2011 Foreign Currency Revenue Forecast Contracts [Member] EUR (€)	Dec. 26, 2010 Foreign Currency Revenue Forecast Contracts [Member] USD ($)
Notional amount of derivatives								$ 28,100,000	$ 28,100,000	€ 20,200,000
Notional amount of derivatives not designated as hedging instruments						3,300,000
Assets	52,000		52,000		965,000	7,000	27,000	45,000	45,000		938,000
Liabilities	724,000		724,000		298,000		20,000	724,000	724,000		278,000
Unrealized loss recorded in Other Comprehensive Income, net of tax	57,000	584,000	(1,762,000)	2,136,000	679,000				1,400,000
Tax of unrealized loss recorded in Other Comprehensive Income									200,000
Reclassification of unrealized loss on foreign currency hedge to earning within 12 months	1,400,000		1,400,000
Reclassification of unrealized loss on foreign currency hedge to earning within 12 months, tax			200,000
Expense related to foreign currency hedges recorded in cost of goods sold								300,000	500,000
Hedge ineffectiveness									$ 100,000