Fair Value Measurement, Financial Instruments And Risk Management (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 25, 2012	Dec. 30, 2012
Fair Value Disclosures [Line Items]
Liabilities	$ 111,000		$ 208,000
Unrealized gain recorded in other comprehensive income	(157,000)	(592,000)	(1,521,000)
Tax of unrealized loss recorded in other comprehensive Income	0	(13,000)
Unrealized loss from cash flow hedge expected to be reclassified to earnings over the next 12 months	100,000
Unrealized loss from cash flow hedge reclassified to earnings, tax	100,000
Hedge ineffectiveness	0
Foreign Currency Forward Exchange Contracts [Member]
Fair Value Disclosures [Line Items]
Notional amount of derivatives not designated as hedging instruments	4,400,000
Liabilities	111,000		208,000
Foreign Currency Revenue Forecast Contracts [Member]
Fair Value Disclosures [Line Items]
Unrealized gain recorded in other comprehensive income	100,000
Tax of unrealized loss recorded in other comprehensive Income	100,000
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ 200,000