Leases - (Rental Expenses and Income) (Details) $ in Thousands	12 Months Ended
Dec. 26, 2018 USD ($)
Rental expense:
Total rental expense	$ 31,083
Rental income:
Base rents	22,831
Contingent rents	4,662
Total rental income	27,493
Included as a component of occupancy:
Rental expense:
Base rents	10,272
Contingent rents	3,074
Included as a component of costs of franchise and license revenue:
Rental expense:
Base rents	15,108
Contingent rents	$ 2,629

Amount of contingent rental revenue recognized for the period under lease, based on the occurrences of an event or condition.

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The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

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The total amount of lease revenue recognized for the period for which the lessee was obligated under leasing arrangements regardless of any other events or conditions. This amount excludes contingent revenue and sublease revenue.

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The increases or decreases in lease payments that result from changes occurring after the inception of the lease in the factors (other than the passage of time) on which lease payments are based, except that any escalation of minimum lease payments relating to increases in construction or acquisition cost of the leased property or for increases in some measure of cost or value during the construction or preconstruction period, are excluded from contingent rentals. Contingent rentals also may include amounts for which the triggering events have not yet occurred or the specified targets for which have not yet been achieved (such as sales based percentage rent), but which events are considered probable of occurring or which specified targets are considered probable of being achieved.

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This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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