Description of Business - Additional Information (Details)	Mar. 12, 2015	Sep. 12, 2017 state restaurant	Sep. 06, 2016 state restaurant
Franchisor Disclosure [Line Items]
Number of states in which entity operates | state		15	16
Stock purchase agreement date	Mar. 12, 2015
Entity Operated Units [Member]
Franchisor Disclosure [Line Items]
Number of restaurants		305	300
Franchised Units [Member]
Franchisor Disclosure [Line Items]
Number of restaurants		253	246
Franchised Units [Member] | GUAM
Franchisor Disclosure [Line Items]
Number of restaurants		1	1