Summary of Refranchising and Franchise Acquisitions - Additional Information (Details) $ in Thousands	6 Months Ended
	Jun. 18, 2019 USD ($) franchise
Business Acquisition [Line Items]
Business combination recognized identifiable assets acquired and liabilities assumed, operating lease right of use assets	$ 858
Business combination recognized identifiable assets acquired and liabilities assumed, operating lease liabilities	$ (858)
Significant Changes, Franchises Purchased During Period | franchise	3
Goodwill, Acquired During Period	$ 2,672
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	578
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	(130)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	3,120
Unfavorable Sublease Assets [Member] | Stores Sold [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 1,000