Segments - Summary of Company's Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	$ 852,338	$ 699,177
Operating Segments [Member] | Franchise [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	204,137	206,997
Operating Segments [Member] | Corporate-owned Stores [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	157,509	151,620
Operating Segments [Member] | Equipment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	210,997	208,168
Unallocated [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	$ 279,695	$ 132,392