Long-term Debt - Summary of Long-term Debt (Details) - USD ($)	Jun. 27, 2020	Dec. 28, 2019
Debt Instrument [Line Items]
Long-term debt, gross	$ 719,875,000	$ 540,375,000
Long-term debt less debt discount	615,641,000	536,396,000
Less current maturities	0	(10,500,000)
Long-term debt - non-current portion	615,641,000	525,896,000
Finance lease obligations	32,593,000	33,296,000
Less current maturities	(3,293,000)	(3,259,000)
Long-term debt and finance lease obligations, less current portion and debt discount	644,941,000	555,933,000
Revolving credit facility, due July 18, 2024 \| Credit facility
Debt Instrument [Line Items]
Long-term debt, gross	0	148,000,000
2025 Notes \| Convertible senior notes
Debt Instrument [Line Items]
Long-term debt, gross	402,500,000	0
Unamortized discount	(101,780,000)	0
Term loan, due July 18, 2024 \| Term loan
Debt Instrument [Line Items]
Long-term debt, gross	317,375,000	392,375,000
Unamortized discount	$ (2,454,000)	$ (3,979,000)

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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