Cash, Cash Equivalents, and Investments - Effective Maturity Dates of Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	$ 41,777
1-2 Years	118,522
2-3 Years	171,448
3-4 Years	33,381
4-5 Years	50,723
5-8 Years	3,886
Fair Value	419,737
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	33,585
1-2 Years	64,435
2-3 Years	94,424
3-4 Years	2,428
4-5 Years	29,480
5-8 Years	0
Fair Value	224,352
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	0
1-2 Years	32,317
2-3 Years	54,487
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	86,804
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	410
1-2 Years	5,287
2-3 Years	14,663
3-4 Years	29,396
4-5 Years	21,243
5-8 Years	3,886
Fair Value	74,885
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	3,016
1-2 Years	12,502
2-3 Years	4,899
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	20,417
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	4,766
1-2 Years	3,981
2-3 Years	1,475
3-4 Years	1,557
4-5 Years	0
5-8 Years	0
Fair Value	11,779
Agency Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	0
1-2 Years	0
2-3 Years	1,500
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	$ 1,500