Cash, Cash Equivalents, and Investments - Effective Maturity Dates of Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 05, 2015
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	$ 142,343
1-2 Years	187,419
2-3 Years	121,779
3-4 Years	39,215
4-5 Years	14,752
5-8 Years	5,312
Fair Value	510,820
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	37,413
1-2 Years	101,597
2-3 Years	74,312
3-4 Years	22,542
4-5 Years	5,770
5-8 Years	0
Fair Value	241,634
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	31,644
1-2 Years	64,524
2-3 Years	0
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	96,168
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	392
1-2 Years	8,564
2-3 Years	38,917
3-4 Years	16,673
4-5 Years	8,982
5-8 Years	4,312
Fair Value	77,840
Supranational bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	1,902
1-2 Years	0
2-3 Years	0
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	1,902
Euro liquidity fund
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	62,045
1-2 Years	0
2-3 Years	0
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	62,045
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	5,605
1-2 Years	6,040
2-3 Years	0
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	11,645
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	1,819
1-2 Years	334
2-3 Years	3,546
3-4 Years	0
4-5 Years	0
5-8 Years	1,000
Fair Value	6,699
Agency Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	1,523
1-2 Years	6,360
2-3 Years	5,004
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	$ 12,887