Segments - Summary of Company's Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	$ 1,875,636	$ 1,717,190
Operating Segments | Franchise revenue
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	203,930	193,504
Operating Segments | Corporate-owned stores
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	477,501	471,234
Operating Segments | Equipment revenue
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	187,700	197,656
Unallocated
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	$ 1,006,505	$ 854,796