Derivatives and Hedging Activities - Impact on Earnings (Details 3) - Foreign Exchange Forward Contract [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Effective portion of designated cash flow derivative contracts
Amount of gain recognized in OCI	$ (1,114,000)	$ (15,021,000)	$ 5,298,000	$ 3,897,000
Amount of gain (loss) reclassified from AOCI to earnings	604,000	(6,353,000)	(13,151,000)	(15,760,000)
Cash Flow Hedging [Member]
Effective portion of designated cash flow derivative contracts
Amount of gain recognized in OCI	1,532,000	(15,021,000)	2,312,000	3,897,000
Amount of gain (loss) reclassified from AOCI to earnings	604,000	(6,353,000)	(13,151,000)	(15,760,000)
Net Investment Hedging [Member]
Effective portion of designated cash flow derivative contracts
Amount of gain recognized in OCI	(2,646,000)	0	2,986,000	0
Amount of gain (loss) reclassified from AOCI to earnings	$ 0	$ 0	$ 0	$ 0