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Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 02, 2016 | Jan. 02, 2016
Available-for-sale securities |  |
Available-for-sale securities, Cost | $ 185,285 |
Cash, cash equivalents and investments |  |
Auction-rate securities guaranteed by the U.S. government | 6,000 |
Auction-rate securities privately insured | 2,000 |
Auction-rate securities having credit rating 'AA' | 6,000 |
Auction-rate securities having credit rating 'A' | 2,000 |
Other-than-temporary impairment losses | 0 |
Cash on hand, Cost | 76,197 | $ 59,071
Cash on hand, Fair Value | 76,197 | 59,071
Cash and cash equivalents, Cost | 126,690 | 114,084
Cash and cash equivalents, Gross Unrealized Gains |  | 1
Cash and cash equivalents, Fair Value | 126,690 | 114,085
Cash Equivalents: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 50,493 | 55,013
Available-for-sale securities, Gross Unrealized Gains |  | 1
Available-for-sale securities, Fair Value | 50,493 | 55,014
Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 126,792 | 128,900
Available-for-sale securities, Gross Unrealized Losses | (32) | (42)
Available-for-sale securities, Gross Unrealized Gains | 64 | 43
Available-for-sale securities, Fair Value | 126,824 | 128,901
Long-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 8,000 | 8,000
Available-for-sale securities, Gross Unrealized Losses | (1,155) | (874)
Available-for-sale securities, Fair Value | 6,845 | 7,126
Money market funds | Cash Equivalents: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 40,720 | 37,721
Available-for-sale securities, Fair Value | 40,720 | 37,721
Municipal bonds | Cash Equivalents: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 5,724 | 1,576
Available-for-sale securities, Gross Unrealized Gains |  | 1
Available-for-sale securities, Fair Value | 5,724 | 1,577
Municipal bonds | Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 85,668 | 93,506
Available-for-sale securities, Gross Unrealized Losses | (14) | (32)
Available-for-sale securities, Gross Unrealized Gains | 55 | 42
Available-for-sale securities, Fair Value | 85,709 | 93,516
Commercial paper | Cash Equivalents: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 1,200 | 11,272
Available-for-sale securities, Fair Value | 1,200 | 11,272
Commercial paper | Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 2,489 | 11,176
Available-for-sale securities, Fair Value | 2,489 | 11,176
Variable-rate demand notes | Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 18,395 | 8,995
Available-for-sale securities, Fair Value | 18,395 | 8,995
Certificates of deposit | Cash Equivalents: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 2,849 | 2,845
Available-for-sale securities, Fair Value | 2,849 | 2,845
Certificates of deposit | Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost |  | 8,000
Available-for-sale securities, Fair Value |  | 8,000
US government agency | Cash Equivalents: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost |  | 1,599
Available-for-sale securities, Fair Value |  | 1,599
US government agency | Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost |  | 3,997
Available-for-sale securities, Gross Unrealized Gains |  | 1
Available-for-sale securities, Fair Value |  | 3,998
International government bonds | Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 2,220 | 2,227
Available-for-sale securities, Gross Unrealized Losses |  | (7)
Available-for-sale securities, Gross Unrealized Gains | 1 |
Available-for-sale securities, Fair Value | 2,221 | 2,220
Corporate bonds | Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 8,021 | 999
Available-for-sale securities, Gross Unrealized Losses | (18) | (3)
Available-for-sale securities, Fair Value | 8,003 | 996
U.S. government bonds | Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 6,004 |
Available-for-sale securities, Gross Unrealized Gains | 5 |
Available-for-sale securities, Fair Value | 6,009 |
Asset-backed securities | Short-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 3,995 |
Available-for-sale securities, Gross Unrealized Gains | 3 |
Available-for-sale securities, Fair Value | 3,998 |
Auction rate securities | Long-term Investments: |  |
Available-for-sale securities |  |
Available-for-sale securities, Cost | 8,000 | 8,000
Available-for-sale securities, Gross Unrealized Losses | (1,155) | (874)
Available-for-sale securities, Fair Value | $ 6,845 | $ 7,126

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- Definition The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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