Long-Term Debt Debt Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 30, 2018
Debt Instrument [Line Items]
Total obligations under capital leases	$ 3,654	$ 3,941
Long-term Debt	453,654	278,941
Less: current portion	(6,512)	(1,948)
Less: deferred financing costs	(8,519)	(3,673)
Debt Instrument, Unamortized Discount	(2,082)	0
Add: bond premium	0	3,503
Long-term debt, net of current portion	436,541	276,823
Term Loan B Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	425,000	0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	25,000	0
Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	$ 0	$ 275,000

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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