Cash, Cash Equivalents, and Investments - Effective Maturity Dates of Available-for-Sale Investments (Detail) $ in Thousands	Oct. 04, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
1 year or less	$ 272,584
1-2 years	115,888
2-3 years	89,609
3-4 years	23,639
4-5 years	9,950
5-8 years	476
Fair value	512,146
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	45,170
1-2 years	95,528
2-3 years	65,060
3-4 years	17,922
4-5 years	3,332
5-8 years	0
Fair value	227,012
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
1 year or less	82,401
1-2 years	5,099
2-3 years	11,481
3-4 years	0
4-5 years	0
5-8 years	0
Fair value	98,981
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
1 year or less	60,992
1-2 years	5,675
2-3 years	9,768
3-4 years	5,717
4-5 years	6,618
5-8 years	476
Fair value	89,246
Euro Liquidity Fund
Schedule of Available-for-sale Securities [Line Items]
1 year or less	63,672
1-2 years	0
2-3 years	0
3-4 years	0
4-5 years	0
5-8 years	0
Fair value	63,672
Agency Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	10,980
1-2 years	0
2-3 years	3,300
3-4 years	0
4-5 years	0
5-8 years	0
Fair value	14,280
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	7,568
1-2 years	$ 4,702
2-3 years
3-4 years	$ 0
4-5 years	0
5-8 years	0
Fair value	12,270
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	1,801
1-2 years	4,884
2-3 years	0
3-4 years	0
4-5 years	0
5-8 years	0
Fair value	$ 6,685