Consolidated Statements of Cash Flows (unaudited) Consolidated Statements of Cash Flows (Parenthetical)	6 Months Ended
Jun. 30, 2016 store
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] \| Franchisee Group One [Member]
Refranchised stores	84

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 952
-SubTopic 605
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68064525&loc=d3e68639-108044

Name:	us-gaap_SignificantChangesFranchisesSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration