Indebtedness and Interest Expense - Schedule of Debt (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018	Dec. 30, 2018
Debt Instrument [Line Items]
Long-term debt, gross	$ 975,100		$ 975,100		$ 978,900
Deferred financing costs, net	(6,743)		(6,743)		(8,633)
Debt Issuance Costs, Noncurrent, Net	(883)		(883)		(1,153)
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	(7,600)		(7,600)		(7,600)
Bank indebtedness and other long-term debt, net of deferred financing costs, less current portion	959,874		959,874		961,514
Interest Expense, Other Long-term Debt	(337)	$ (341)	(398)	$ (640)
Interest Expense	19,979	19,113	39,787	37,671
Term Loan Facility [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	10,577	9,681	21,243	18,800
Long-term debt, gross	720,100		720,100		723,900
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt	255,000		255,000		$ 255,000
Interest Expense, Debt, Excluding Amortization	5,083	5,083	10,165	10,165
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Capital Leases, Income Statement, Interest Expense	376	431	757	859
InterestExpenseSaleLeaseback	2,683	2,623	5,377	5,252
Sale Leaseback Obligations [Member]
Debt Instrument [Line Items]
Amortization of debt issuance costs	$ 923	$ 954	$ 1,847	$ 1,955
Senior Notes due 2022 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.00%		8.00%

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