Basis of Presentation and Updates to Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 25, 2018	Mar. 26, 2017	Dec. 31, 2017
Basis of Presentation [Line Items]
Revenue	$ 785,371	$ 624,217
Advertising fund assets, restricted	112,265		$ 120,223	[1]
Store Opening and Development Fees [Member]
Basis of Presentation [Line Items]
Revenue	1,100
Contract liability	18,900		$ 19,400
International Franchise [Member] | Alaska and Hawaii [Member]
Basis of Presentation [Line Items]
Revenue		600
International Franchise [Member] | International Franchise Royalties and Fees [Member]
Basis of Presentation [Line Items]
Revenue	52,421	42,218
Domestic Stores [Member] | Domestic Franchise [Member]
Basis of Presentation [Line Items]
Advertising fund assets, restricted	105,800
Domestic Stores [Member] | Domestic Company Owned Stores [Member]
Basis of Presentation [Line Items]
Revenue	121,186	113,545
Advertising fund assets, restricted	6,500
Domestic Stores [Member] | Domestic Franchise Royalties and Fees [Member]
Basis of Presentation [Line Items]
Revenue	89,490	79,901
Domestic Stores [Member] | Domestic Franchise Advertising [Member]
Basis of Presentation [Line Items]
Revenue	82,211
Supply Chain [Member]
Basis of Presentation [Line Items]
Revenue	$ 440,063	$ 388,553

[1] Note: The balance sheet at December 31, 2017 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.