Shareholders' Equity (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		14 Months Ended
		Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Dec. 31, 2014	Dec. 12, 2014	May. 31, 2014
Changes In Components Of OCI [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment		$ 47,727	$ (14,222)	$ (150,660)	$ (24,729)
Other Comprehensive Income (Loss) Unrealized gain (loss) on investment securities, net		2,169	5,134	2,293	5,730
Other Comprehensive Income (Loss), Unrealized Gain on Derivatives Arising During Period, Net		(230)	100	693	199
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax		(882)	(553)	(1,724)	(1,106)
Net change in accumulated other comprehensive income (loss)		$ 50,548	(8,435)	(145,950)	(17,694)
Stock Repurchase Program, Authorized Amount							$ 400,000	$ 200,000	$ 200,000
Treasury Stock, Shares, Acquired		1,303,642				4,955,350
Treasury Stock, Value, Acquired, Cost Method		$ 77,694				$ 280,597
Other comprehensive income before reclassifications [Member]
Changes In Components Of OCI [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment	[1]	47,890	(14,291)	(151,338)	(24,662)
Other Comprehensive Income (Loss) Unrealized gain (loss) on investment securities, net		2,169	5,134	2,293	5,730
Other Comprehensive Income (Loss), Unrealized Gain on Derivatives Arising During Period, Net		(346)	0	550	0
Other Comprehensive Income (loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (loss) Recognized in Net Periodic Benefit Cost, After Tax		35	37	69	73
Other comprehensive income before reclassifications [Member] | Intra-entity foreign currency transactions [Member]
Changes In Components Of OCI [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment		600	13,073	45,863	19,470
Reclassification out of Accumulated Other Comprehensive Income [Member]
Changes In Components Of OCI [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment		(163)	69	678	(67)
Other Comprehensive Income (Loss) Unrealized gain (loss) on investment securities, net		0	0	0	0
Other Comprehensive Income (Loss), Unrealized Gain on Derivatives Arising During Period, Net		116	100	143	199
Other Comprehensive Income (loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (loss) Recognized in Net Periodic Benefit Cost, After Tax		$ 847	$ 516	$ 1,655	$ 1,033

[1] Includes intra-entity foreign currency transactions that are of a long-term investment nature of $600 and $45,863 for the second quarter and first six months of 2015 and $13,073 and $19,470 for the second quarter and first six months of 2014, respectively.