Balance Sheet Information Balance Sheet Information-AOCI Rollforward (Details 7) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Accumulated Other Comprehensive Income (Loss)
Balance at December 28, 2014			$ (208,072,000)
Other comprehensive income (loss) before reclassifications			3,171,000
Amount reclassified from AOCI			10,573,000
Tax effects	$ (82,000)	$ 15,216,000	(3,015,000)	$ 7,646,000
Balance at September 27, 2015	(197,343,000)		(197,343,000)
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss)
Balance at December 28, 2014			3,359,000
Other comprehensive income (loss) before reclassifications			3,486,000
Amount reclassified from AOCI			(2,578,000)
Tax effects			(278,000)
Balance at September 27, 2015	3,989,000		3,989,000
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss)
Balance at December 28, 2014			(197,252,000)
Other comprehensive income (loss) before reclassifications			(2,627,000)
Amount reclassified from AOCI			0
Tax effects			(2,737,000)
Balance at September 27, 2015	(202,616,000)		(202,616,000)
Hedging Activities [Member]
Accumulated Other Comprehensive Income (Loss)
Balance at December 28, 2014			(14,179,000)
Other comprehensive income (loss) before reclassifications			2,312,000
Amount reclassified from AOCI			13,151,000
Tax effects			0
Balance at September 27, 2015	$ 1,284,000		$ 1,284,000