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Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) $ in Thousands | Oct. 01, 2017 USD ($)
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Schedule of Available-for-sale Securities [Line Items] |
Fair value, less than 12 months | $ 171,009
Unrealized losses, less than 12 months | (246)
Fair value, 12 months or greater | 77,405
Unrealized losses, 12 months or greater | (242)
Total fair value | 248,414
Total unrealized losses | (488)
Treasury Bills |
Schedule of Available-for-sale Securities [Line Items] |
Fair value, less than 12 months | 95,174
Unrealized losses, less than 12 months | (150)
Fair value, 12 months or greater | 33,627
Unrealized losses, 12 months or greater | (79)
Total fair value | 128,801
Total unrealized losses | (229)
Asset-Backed Securities |
Schedule of Available-for-sale Securities [Line Items] |
Fair value, less than 12 months | 51,878
Unrealized losses, less than 12 months | (55)
Fair value, 12 months or greater | 8,770
Unrealized losses, 12 months or greater | (2)
Total fair value | 60,648
Total unrealized losses | (57)
Sovereign Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Fair value, less than 12 months | 2,495
Unrealized losses, less than 12 months | (5)
Fair value, 12 months or greater | 19,854
Unrealized losses, 12 months or greater | (69)
Total fair value | 22,349
Total unrealized losses | (74)
Municipal Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Fair value, less than 12 months | 1,356
Unrealized losses, less than 12 months | (3)
Fair value, 12 months or greater | 0
Unrealized losses, 12 months or greater | 0
Total fair value | 1,356
Total unrealized losses | (3)
Corporate Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Fair value, less than 12 months | 20,106
Unrealized losses, less than 12 months | (33)
Fair value, 12 months or greater | 15,154
Unrealized losses, 12 months or greater | (92)
Total fair value | 35,260
Total unrealized losses | $ (125)

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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27337-111563 + Details
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