Long-term debt - Schedule of Long-term debt (Details) - USD ($) $ in Thousands	Jun. 25, 2022	Dec. 25, 2021
Long-term debt
Principal	$ 487,848	$ 487,895
Unamortized debt issuance costs	(5,875)	(6,377)
Finance lease liabilities	7,048	7,095
Total debt	481,973	481,518
Less: current portion of finance lease liabilities	90	98
Total long-term debt	481,883	481,420
Initial First Lien Term Loan Facility
Long-term debt
Principal	480,800	480,800
Unamortized debt issuance costs	(5,875)	(6,377)
Total debt, net	$ 474,925	$ 474,423

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 accumulated amortization, of debt discount (premium).

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

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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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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, including portion classified as current.

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