Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019
Debt Instrument [Line Items]
Long-term debt, gross	$ 686,644
Finance lease obligations	33,895	$ 33,296
Less current maturities	(3,531)	(3,259)
Long-term debt and finance lease obligations, less current portion and debt discount	713,246	555,933
Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	686,644	540,375
Unamortized discount	(3,762)	(3,979)
Total term loan and revolving credit facility	682,882	536,396
Less current maturities	0	(10,500)
Term loan and revolving credit facility - non-current portion	682,882	525,896
Revolving credit facility, due July 18, 2024 \| Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	294,269	148,000
Term loan, due July 18, 2024 \| Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 392,375	$ 392,375

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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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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