XML 68 R47.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Summary of Significant Accounting Policies, Segment (Details) - restaurant | Dec. 26, 2017 | Dec. 27, 2016
--- | --- | ---
Company |  |
Segment Reporting |  |
Number of restaurants | 462 | 431
Franchise |  |
Segment Reporting |  |
Number of restaurants | 87 | 86

X
- Definition Represents the number of restaurants. + References No definition available. + Details
Name: | us-gaap_NumberOfRestaurants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FranchisorDisclosureAxis=us-gaap_EntityOperatedUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FranchisorDisclosureAxis=us-gaap_FranchisedUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |