Other Comprehensive Income - Components of Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Jun. 28, 2014	Dec. 31, 2013	Jun. 29, 2013	Dec. 31, 2012
Other Comprehensive Income Loss [Line Items]
Unrealized gains (losses) on hedging transactions, Gross (recognized in OCI)		$ (563)		$ 3,096
Foreign currency translation adjustments	(8,226)	(8,222)	(8,226)	(8,222)	(8,035)	(7,839)	(8,404)	(8,721)
Unrealized gains (losses) on hedging transactions, Income tax (benefit) (recognized in OCI)		(118)		765
Unrealized gains (losses) on hedging transactions, Net (recognized in OCI)		(445)		2,331
Unrealized gains (losses) on investments, Gross (recognized in OCI)	(67)	518	536	(1,140)
Unrealized gains (losses) on investments, Income tax (benefit) (recognized in OCI)	(22)	157	139	(373)
Unrealized gains (losses) on investments, Net (recognized in OCI)	(45)	361	397	(767)
Foreign currency translation adjustments (recognized in OCI)	(191)	182	(380)	390
Total accumulated other comprehensive gains (losses) (recognized in OCI)	4,027	98	7,089	1,954
Unrealized gains (losses) on hedging transactions, Gross (reclassified from AOCI to income)		(749)		(2,648)
Unrealized gains (losses) on hedging transactions, Income tax (benefit) (reclassified from AOCI to income)		(187)		(662)
Unrealized gains (losses) on hedging transactions, Net (reclassified from AOCI to income)		(562)		(1,986)
Unrealized gains (losses) on investments, Gross (reclassified from AOCI to income)	443	106	517	380
Unrealized gains (losses) on investments, Income tax (benefit) (reclassified from AOCI to income)	158	34	178	119
Unrealized gains (losses) on investments, Net (reclassified from AOCI to income)	285	72	339	261
Foreign currency translation adjustments (reclassified from AOCI to income)	0	0	(7)	109
Total accumulated other comprehensive gains (losses) (reclassified from AOCI to income)	374	(490)	(999)	(1,616)
Unrealized gains (losses) on hedging transactions, Gross (Subtotal)		(1,312)		448
Unrealized gains losses on hedging transactions, Income tax (benefit) (Subtotal)		(305)		103
Unrealized gains (losses) on hedging transactions, Net (Subtotal)	4,352	(1,007)	5,741	345
Unrealized gains (losses) on investments, Gross (Subtotal)	376	624	1,053	(760)
Unrealized gains (losses) on investments, Income tax (benefit) (Subtotal)	136	191	317	(254)
Unrealized gains (losses) on investments, Net (Subtotal)	240	433	736	(506)
Foreign currency translation adjustments (Subtotal)	(191)	182	(387)	499
Total accumulated other comprehensive gains (losses) (Subtotal)	4,401	(392)	6,090	338
Total accumulated other comprehensive gains (losses)	(3,691)	(9,987)	(3,691)	(9,987)	(8,092)	(9,781)	(9,595)	(10,325)
Anticipated Sales [Member]
Other Comprehensive Income Loss [Line Items]
Unrealized gains (losses) on hedging transactions, Gross (recognized in OCI)	6,304		9,892
Unrealized gains (losses) on hedging transactions, Income tax (benefit) (recognized in OCI)	1,260		2,039
Unrealized gains (losses) on hedging transactions, Net (recognized in OCI)	5,044		7,853
Unrealized gains (losses) on hedging transactions, Gross (reclassified from AOCI to income)	113		(1,696)
Unrealized gains (losses) on hedging transactions, Income tax (benefit) (reclassified from AOCI to income)	24		(365)
Unrealized gains (losses) on hedging transactions, Net (reclassified from AOCI to income)	89		(1,331)
Unrealized gains (losses) on hedging transactions, Gross (Subtotal)	6,417		8,196
Unrealized gains losses on hedging transactions, Income tax (benefit) (Subtotal)	1,284		1,674
Unrealized gains (losses) on hedging transactions, Net (Subtotal)	5,133		6,522
Unrealized gains (losses) on hedging transactions, Gross	5,823	(2,133)	5,823	(2,133)	(594)	(2,373)	(821)	(2,581)
Unrealized gains (losses) on hedging transactions, Income tax (benefit)	1,165	(496)	1,165	(496)	(119)	(509)	(191)	(599)
Total accumulated other comprehensive gains (losses)	4,658	(1,637)	4,658	(1,637)	(475)	(1,864)	(630)	(1,982)
Forward Interest Rate Swap Contracts [Member]
Other Comprehensive Income Loss [Line Items]
Unrealized gains (losses) on hedging transactions, Gross (recognized in OCI)	(1,224)		(1,224)
Unrealized gains (losses) on hedging transactions, Income tax (benefit) (recognized in OCI)	(443)		(443)
Unrealized gains (losses) on hedging transactions, Net (recognized in OCI)	(781)		(781)
Unrealized gains (losses) on hedging transactions, Gross (reclassified from AOCI to income)	0		0
Unrealized gains (losses) on hedging transactions, Income tax (benefit) (reclassified from AOCI to income)	0		0
Unrealized gains (losses) on hedging transactions, Net (reclassified from AOCI to income)	0		0
Unrealized gains (losses) on hedging transactions, Gross (Subtotal)	(1,224)		(1,224)
Unrealized gains losses on hedging transactions, Income tax (benefit) (Subtotal)	(443)		(443)
Unrealized gains (losses) on hedging transactions, Net (Subtotal)	(781)		(781)
Unrealized gains (losses) on hedging transactions, Gross	(1,224)	0	(1,224)	0
Unrealized gains (losses) on hedging transactions, Income tax (benefit)	(443)	0	(443)	0
Total accumulated other comprehensive gains (losses)	(781)	0	(781)	0
Investments [Member]
Other Comprehensive Income Loss [Line Items]
Unrealized gains (losses) on hedging transactions, Gross	902	(220)	902	(220)	526	(151)	(844)	540
Unrealized gains (losses) on hedging transactions, Income tax (benefit)	244	(92)	244	(92)	108	(73)	(283)	162
Total accumulated other comprehensive gains (losses)	$ 658	$ (128)	$ 658	$ (128)	$ 418	$ (78)	$ (561)	$ 378