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Refranchisings and Acquisitions - (Acquisition Activity) (Details) $ in Thousands	12 Months Ended
	Dec. 30, 2020 USD ($) restaurant parcel	Dec. 25, 2019 USD ($) restaurant parcel	Dec. 26, 2018 USD ($) restaurant parcel
Business Acquisition [Line Items]
Restaurants acquired from franchisees | restaurant	0	0	6
Purchase price allocation:
Reacquired franchise rights	$ 0	$ 0	$ 5,434
Property	0	0	1,121
Goodwill	0	0	1,574
Total purchase price	0	0	8,129
Finance leases recorded	0	0	2,409
Real Estate
Purchase price allocation:
Total purchase price	$ 0	$ 11,320	$ 1,787
Real estate parcels acquired | parcel	0	5	1

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Amount of financing lease obligations assumed during the period.

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Purchase Price Allocation [Abstract]

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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The number of franchises purchased during the period when there are significant changes in franchisor-owned outlets or franchised outlets during the period.

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