Long-Term Debt Debt Balances (Details) - USD ($)	3 Months Ended
Apr. 04, 2021	Mar. 29, 2020	Jan. 03, 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period	4.40%	4.90%
Total obligations under capital leases	$ 1,315,000		$ 908,000
Long-term Debt	493,315,000		494,158,000
Less: current portion	(5,668,000)		(5,525,000)
Less: deferred financing costs	(7,405,000)		(7,777,000)
Debt Instrument, Unamortized Discount	(4,961,000)		(5,161,000)
Long-term debt, net of current portion	475,281,000		475,695,000
Term Loan B Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	418,312,000		419,375,000
Term Loan B-1 Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	73,688,000		$ 73,875,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	$ 0

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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The average effective interest rate during the reporting period.

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