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Debt (Details Textual) - USD ($) |  | 6 Months Ended |
--- | --- | --- | ---
Oct. 09, 2014 | Jun. 29, 2019 | Dec. 29, 2018
Debt Instrument [Line Items] |  |  |
Unamortized discount |  | $ 4,348,000 | $ 4,709,000
Document Period End Date |  | Jun. 29, 2019 |
Senior Notes [Member] | Senior Notes Due 2024 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount, issued | $ 350,000,000.0 | $ 350,000,000 | 350,000,000
Stated interest rate of Senior Notes | 4.375% |  |
Proceeds from Senior Notes, net | $ 342,400,000 |  |
Unamortized discount | 1,400,000 | 4,348,000 | $ 4,709,000
Debt issuance costs | $ 6,200,000 |  |
Fair value of notes payable |  | $ 372,400 |

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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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