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Long-Term Debt Debt Balances (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2021	Jun. 28, 2020	Jun. 28, 2020	Jan. 03, 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period	4.40%	4.30%	4.60%
Total obligations under capital leases	$ 1,451			$ 908
Long-term Debt	521,451			494,158
Less: current portion	(4,996)			(5,525)
Less: deferred financing costs	(7,005)			(7,777)
Debt Instrument, Unamortized Discount	(663)			(5,161)
Long-term debt, net of current portion	508,787			475,695
Term Loan B Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	174,000			419,375
Term Loan B-1 Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	0			73,875
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	46,000			0
Senior Unsecured Notes Due 2029
Debt Instrument [Line Items]
Long-term Debt	$ 300,000			$ 0