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Long-term Debt and Letters of Credit - Schedule of Remaining Unamortized Debt Discount and Debt Issuance Costs (Detail) - USD ($) $ in Thousands | Sep. 28, 2020 | Dec. 30, 2019
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Debt Instrument [Line Items] |  |
Debt Issuance Costs | $ 7,802 | $ 12,974
Debt Discount | 3,054 | 11,943
1.75% Convertible Senior Notes due December 15, 2020 |  |
Debt Instrument [Line Items] |  |
Debt Issuance Costs | 219 | 995
Debt Discount | $ 2,188 | $ 9,927
Effective Interest Rate | 6.48% | 6.48%
Term Loan Due September 2024 |  |
Debt Instrument [Line Items] |  |
Debt Issuance Costs | $ 2,862 | $ 6,663
Debt Discount | $ 866 | $ 2,016
Effective Interest Rate | 4.66% | 4.66%
Senior Notes Due October 2025 |  |
Debt Instrument [Line Items] |  |
Debt Issuance Costs | $ 4,721 | $ 5,316
Effective Interest Rate | 5.92% | 5.92%

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