Other Comprehensive Income - Components of Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2011
Other Comprehensive Income Loss [Line Items]
Foreign currency translation adjustments	$ (8,627)	$ (8,880)	$ (8,721)	$ (8,963)
Total accumulated other comprehensive loss	(8,560)	(8,206)	(10,325)	(4,213)
Unrealized gains (losses) on hedging transactions, Gross (recognized in OCI)	3,292	(7,695)
Unrealized gains (losses) on hedging transactions, Income tax (benefit) (recognized in OCI)	782	(2,181)
Unrealized gains (losses) on hedging transactions, Net (recognized in OCI)	2,510	(5,514)
Unrealized gains (losses) on investments, Gross (recognized in OCI)	(287)	884
Unrealized gains (losses) on investments, Income tax (benefit) (recognized in OCI)	(94)	299
Unrealized gains (losses) on investments, Net (recognized in OCI)	(193)	585
Foreign currency translation adjustments (recognized in OCI)	94	83
Total accumulated other comprehensive loss (recognized in OCI)	2,411	(4,846)
Unrealized gains (losses) on hedging transactions, Gross (reclassified from AOCI to income)	(1,022)	1,157
Unrealized gains (losses) on hedging transactions, Income tax (benefit) (reclassified from AOCI to income)	(255)	289
Unrealized gains (losses) on hedging transactions, Net (reclassified from AOCI to income)	(767)	868
Unrealized gains (losses) on investments, Gross (reclassified from AOCI to income)	179	(16)
Unrealized gains (losses) on investments, Income tax (benefit) (reclassified from AOCI to income)	58	(1)
Unrealized gains (losses) on investments, Net (reclassified from AOCI to income)	121	(15)
Foreign currency translation adjustments (reclassified from AOCI to income)	0	0
Total accumulated other comprehensive loss (reclassified from AOCI to income)	(646)	853
Unrealized gains (losses) on hedging transactions, Gross (Subtotal)	2,270	(6,538)
Unrealized gains (losses) on hedging transactions, Income tax (benefit) (Subtotal)	527	(1,892)
Unrealized gains (losses) on hedging transactions, Net (Subtotal)	1,743	(4,646)
Unrealized gains (losses) on investments, Gross (Subtotal)	(108)	868
Unrealized gains (losses) on investments, Income tax (benefit) (Subtotal)	(36)	298
Unrealized gains (losses) on investments, Net (Subtotal)	(72)	570
Foreign currency translation adjustments (Subtotal)	94	83
Total accumulated other comprehensive loss (Subtotal)	1,765	(3,993)
Hedging [Member]
Other Comprehensive Income Loss [Line Items]
Unrealized gains (losses) on hedging transactions, Gross	(311)	817	(2,581)	7,355
Unrealized gains (losses) on hedging transactions, Income tax (benefit)	(72)	204	(599)	2,096
Total accumulated other comprehensive loss	(239)	613	(1,982)	5,259
Investments [Member]
Other Comprehensive Income Loss [Line Items]
Unrealized gains (losses) on hedging transactions, Gross	432	71	540	(797)
Unrealized gains (losses) on hedging transactions, Income tax (benefit)	126	10	162	(288)
Total accumulated other comprehensive loss	$ 306	$ 61	$ 378	$ (509)