Franchise Rights and Goodwill - Additional Information (Detail) - USD ($)	12 Months Ended
Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Intangible Assets Net Including Goodwill [Abstract]
Impairment of the carrying value of franchise rights and goodwill	$ 0	$ 0	$ 0

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

No definition available.

Name:	us-gaap_GoodwillAndIntangibleAssetImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration