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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. 27, 2021	Dec. 28, 2020
Debt Instrument [Line Items]
Debt Issuance Costs	$ 8,297	$ 7,212
Debt Discount	660	814
Senior Notes Due March 2029
Debt Instrument [Line Items]
Debt Issuance Costs	$ 6,114
Effective Interest Rate	4.19%
Term Loan Due September 2024
Debt Instrument [Line Items]
Debt Issuance Costs	$ 2,183	2,695
Debt Discount	$ 660	$ 814
Effective Interest Rate	4.66%	4.66%
Senior Notes Due October 2025
Debt Instrument [Line Items]
Debt Issuance Costs		$ 4,517
Effective Interest Rate		5.92%

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Amount, after accumulated amortization, of debt discount.

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