Financial Information by Operating Segment (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 25, 2018	Mar. 26, 2017
Segment Reporting Information [Line Items]
Revenue	$ 785,371	$ 624,217
Domestic Stores [Member] \| Domestic Franchise Advertising [Member]
Segment Reporting Information [Line Items]
Revenue	$ 82,211
Alaska and Hawaii [Member] \| International Franchise [Member]
Segment Reporting Information [Line Items]
Revenue		$ 600

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration