Nature of Operations - Additional Information (Detail)	12 Months Ended
Dec. 31, 2016 Segment Restaurants
Collaboration Arrangement Disclosure [Abstract]
Number of restaurant owned \| Restaurants	1
Number of reportable business segment \| Segment	1
Offer renewals on the policies acquired	3 years

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

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