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Fair Value Measurements and Fair Value of Financial Instruments - Carrying Value and Fair Value of Debt Obligations (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 30, 2017
--- | --- | ---
Carrying Value [Member] |  |
Long-term Debt Obligations: |  |
Revolving credit facility | $ 202,205 | $ 237,011
Capital lease obligations | 3,843 | 4,101
Other borrowings | 183 | 272
Debt obligations | 206,231 | 241,384
Fair Value [Member] |  |
Long-term Debt Obligations: |  |
Revolving credit facility | 202,205 | 237,011
Capital lease obligations | 3,843 | 4,101
Other borrowings | 183 | 272
Debt obligations | $ 206,231 | $ 241,384

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + 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=109250915&loc=d3e13433-108611 + Details
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