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Cash, Cash Equivalents and Investments (Details 2) - USD ($) $ in Thousands | Oct. 03, 2015 | Jan. 03, 2015
--- | --- | ---
Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for less than twelve months | $ 10,473 | $ 51,658
Fair value of available-for-sale securities, continuous loss position for twelve months or longer | 7,240 | 7,419
Total fair value of available-for-sale securities, continuous loss position | 17,713 | 59,077
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses | (13) | (73)
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses | (760) | (581)
Available-for-sale securities, total gross unrealized losses | (773) | (654)
Cost |  |
Due in one year or less, Cost | 139,704 |
Due after one year through ten years, Cost | 33,136 |
Due after ten years, Cost | 14,915 |
Total Cost | 187,755 |
Fair Value |  |
Due in one year or less, Fair Value | 139,779 |
Due after one year through ten years, Fair Value | 33,195 |
Due after ten years, Fair Value | 14,155 |
Total Fair Value | 187,129 |
Municipal bonds |  |
Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for less than twelve months | 8,274 | 23,735
Total fair value of available-for-sale securities, continuous loss position | 8,274 | 23,735
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses | (10) | (25)
Available-for-sale securities, total gross unrealized losses | (10) | (25)
Corporate bonds |  |
Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for less than twelve months |  | 20,327
Total fair value of available-for-sale securities, continuous loss position |  | 20,327
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses |  | (35)
Available-for-sale securities, total gross unrealized losses |  | (35)
Auction rate securities |  |
Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for twelve months or longer | 7,240 | 7,419
Total fair value of available-for-sale securities, continuous loss position | 7,240 | 7,419
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses | (760) | (581)
Available-for-sale securities, total gross unrealized losses | (760) | (581)
Asset-backed securities |  |
Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for less than twelve months |  | 5,080
Total fair value of available-for-sale securities, continuous loss position |  | 5,080
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses |  | (3)
Available-for-sale securities, total gross unrealized losses |  | (3)
International government bonds |  |
Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for less than twelve months | 2,199 | 2,516
Total fair value of available-for-sale securities, continuous loss position | 2,199 | 2,516
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses | (3) | (10)
Available-for-sale securities, total gross unrealized losses | $ (3) | $ (10)

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