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Fair Value Measurements of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015
--- | --- | --- | --- | ---
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and cash equivalents | $ 23,348 | $ 36,312 | $ 28,548 | $ 34,144
Fair Value measurements on a recurring basis |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative financial instruments | 3,354 | 2,309 |  |
Variable-rate debt obligations | 267,500 | 214,000 |  |
Deferred stock-based compensation | 8,885 | 12,203 |  |
Fair Value measurements on a recurring basis | Government securities |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 6,345 | 6,268 |  |
Fair Value measurements on a recurring basis | Corporate bonds |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 6,149 | 6,017 |  |
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and cash equivalents | 23,348 | 36,312 |  |
Derivative financial instruments | 0 | 0 |  |
Variable-rate debt obligations | 0 | 0 |  |
Deferred stock-based compensation | 0 | 0 |  |
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Government securities |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 0 | 0 |  |
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Corporate bonds |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 0 | 0 |  |
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Derivative financial instruments | 3,354 | 2,309 |  |
Variable-rate debt obligations | 267,500 | 214,000 |  |
Deferred stock-based compensation | 8,885 | 12,203 |  |
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Government securities |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 6,345 | 6,268 |  |
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Corporate bonds |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 6,149 | 6,017 |  |
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Derivative financial instruments | 0 | 0 |  |
Variable-rate debt obligations | 0 | 0 |  |
Deferred stock-based compensation | 0 | 0 |  |
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Government securities |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | 0 | 0 |  |
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Corporate bonds |  |  |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale securities, fair value disclosure | $ 0 | $ 0 |  |

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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