Long-Term Obligations and Notes Payable - Schedule of Long-Term Obligations and Notes Payable (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 03, 2021	Jan. 02, 2021
Debt Instrument [Line Items]
Total principal amount of long-term obligations and notes payable	$ 1,204,069	$ 1,207,604
Less: unamortized debt issuance costs	(29,286)	(31,332)
Total amount of long-term obligations and notes payable, net of unamortized debt issuance costs	1,174,783	1,176,272
Less: current portion of long-term obligations and notes payable	(11,724)	(12,782)
Total amount of long-term obligations and notes payable, net of unamortized debt issuance costs, less current portion	1,163,059	1,163,490
Term loan - First Lien Term Loan
Debt Instrument [Line Items]
Total principal amount of long-term obligations and notes payable	$ 561,600	563,061
Stated Maturity Date	2024-03
Contractual Interest Rate	L + 4.25%
Interest Rate	5.25%
Term loan - First Lien Term Loan \| LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	4.25%
Term loan - First Lien Term Loan Amendment
Debt Instrument [Line Items]
Total principal amount of long-term obligations and notes payable	$ 216,580	217,133
Stated Maturity Date	2024-03
Contractual Interest Rate	L + 5.5%
Interest Rate	6.50%
Term loan - First Lien Term Loan Amendment \| LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	5.50%
Term loan - First Lien Term Loan Fourth Amendment
Debt Instrument [Line Items]
Total principal amount of long-term obligations and notes payable	$ 184,075	184,538
Stated Maturity Date	2024-03
Contractual Interest Rate	L + 6.25%
Interest Rate	7.25%
Term loan - First Lien Term Loan Fourth Amendment \| LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	6.25%
Subordinated Term Loan \| Second Lien Term Loan
Debt Instrument [Line Items]
Total principal amount of long-term obligations and notes payable	$ 240,000	240,000
Stated Maturity Date	2025-03
Contractual Interest Rate	L + 8.0%
Interest Rate	9.00%
Subordinated Term Loan \| Second Lien Term Loan \| LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	8.00%
Notes Payable - Finance Agreements
Debt Instrument [Line Items]
Total principal amount of long-term obligations and notes payable	$ 1,814	2,872
Stated Maturity Date	2021-09
Contractual Interest Rate	2.07%
Interest Rate	2.07%
Revolving Credit Facility
Debt Instrument [Line Items]
Less: unamortized debt issuance costs	$ (400)	$ (500)
Stated Maturity Date	2023-03
Contractual Interest Rate	L + 4.25%
Interest Rate	5.25%

Debt instrument due date month and year.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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

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Contractual interest rate for funds borrowed, under the debt agreement.

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Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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