Financial Instruments (Foreign Exchange Contracts Outstanding, Maturity Dates And Unrealized Gain (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Derivative [Line Items]
UNREALIZED GROSS GAIN (LOSS)	$ 100	$ 24	$ (154)
Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	24,550	39,420
UNREALIZED GROSS GAIN (LOSS)	100	24
Euro [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	4,475	10,642
MATURITY DATE	2013	2012
UNREALIZED GROSS GAIN (LOSS)	(118)	151
Sterling [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	24	4,657
MATURITY DATE	2013	2012
UNREALIZED GROSS GAIN (LOSS)	(24)	(5)
Japanese Yen [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	8,865	12,006
MATURITY DATE	2013	2012
UNREALIZED GROSS GAIN (LOSS)	208	(112)
Hong Kong Dollar [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	3,045	4,569
MATURITY DATE	2013	2012
UNREALIZED GROSS GAIN (LOSS)		(16)
Taiwan Dollar [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	1,567	1,526
MATURITY DATE	2013	2012
UNREALIZED GROSS GAIN (LOSS)		(13)
Mexican Peso [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	1,522	1,020
MATURITY DATE	2013	2012
UNREALIZED GROSS GAIN (LOSS)	(13)	(13)
Chinese Renminbi [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	4,000	5,000
MATURITY DATE	2013	2012
UNREALIZED GROSS GAIN (LOSS)	49	32
Singapore Dollar [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	551
MATURITY DATE	2013
UNREALIZED GROSS GAIN (LOSS)	(1)
Canadian Dollar [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	501
MATURITY DATE	2013
UNREALIZED GROSS GAIN (LOSS)	$ (1)