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Fair Value Measurements (Assets) (Details) - USD ($) $ in Thousands | Sep. 28, 2019 | Dec. 29, 2018
--- | --- | ---
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents (including money market funds) | $ 53,013 | $ 76,819
Fair value, measurements, recurring |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents (including money market funds) | 53,013 | 76,819
Derivative financial instruments - asset | 166 |
Derivative financial instruments - liability | 341 |
Derivative financial instruments |  | 3,797
Deferred stock-based compensation | 7,057 | 7,857
Fair value, measurements, recurring | 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 (including money market funds) | 53,013 | 76,819
Derivative financial instruments - asset | 0 |
Derivative financial instruments - liability | 0 |
Derivative financial instruments |  | 0
Deferred stock-based compensation | 0 | 0
Fair value, measurements, recurring | Significant other observable inputs (Level 2) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents (including money market funds) | 0 | 0
Derivative financial instruments - asset | 166 |
Derivative financial instruments - liability | 341 |
Derivative financial instruments |  | 3,797
Deferred stock-based compensation | 7,057 | 7,857
Fair value, measurements, recurring | Significant unobservable inputs (Level 3) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents (including money market funds) | 0 | 0
Derivative financial instruments - asset | 0 |
Derivative financial instruments - liability | 0 |
Derivative financial instruments |  | 0
Deferred stock-based compensation | 0 | 0
Fair value, measurements, recurring | Government securities |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 6,580 | 7,384
Fair value, measurements, recurring | Government securities | Quoted prices in active markets for identical assets (Level 1) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 0 | 0
Fair value, measurements, recurring | Government securities | Significant other observable inputs (Level 2) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 6,580 | 7,384
Fair value, measurements, recurring | Government securities | Significant unobservable inputs (Level 3) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 0 | 0
Fair value, measurements, recurring | Corporate Bonds |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 6,474 | 4,620
Fair value, measurements, recurring | Corporate Bonds | Quoted prices in active markets for identical assets (Level 1) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 0 | 0
Fair value, measurements, recurring | Corporate Bonds | Significant other observable inputs (Level 2) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 6,474 | 4,620
Fair value, measurements, recurring | Corporate Bonds | Significant unobservable inputs (Level 3) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 0 | 0
Variable Rate Debt Obligation | Fair value, measurements, recurring |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of debt obligations | 140,000 | 150,000
Variable Rate Debt Obligation | Fair value, measurements, recurring | Quoted prices in active markets for identical assets (Level 1) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of debt obligations | 0 | 0
Variable Rate Debt Obligation | Fair value, measurements, recurring | Significant other observable inputs (Level 2) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of debt obligations | 140,000 | 150,000
Variable Rate Debt Obligation | Fair value, measurements, recurring | Significant unobservable inputs (Level 3) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of debt obligations | 0 | 0
Fixed Rate Debt Obligation | Fair value, measurements, recurring |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of debt obligations | 100,000 | 100,000
Fixed Rate Debt Obligation | Fair value, measurements, recurring | Quoted prices in active markets for identical assets (Level 1) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of debt obligations | 0 | 0
Fixed Rate Debt Obligation | Fair value, measurements, recurring | Significant other observable inputs (Level 2) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of debt obligations | 100,000 | 100,000
Fixed Rate Debt Obligation | Fair value, measurements, recurring | Significant unobservable inputs (Level 3) |  |
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of debt obligations | $ 0 | $ 0

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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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