Description of Business - Additional Information (Detail)	Mar. 12, 2015	Jan. 03, 2017 state restaurant	Dec. 29, 2015 state restaurant
Franchisor Disclosure [Line Items]
Number of restaurants		22
Number of states in which entity operates | state		15	16
Stock purchase agreement date	Mar. 12, 2015
Entity operated units
Franchisor Disclosure [Line Items]
Number of restaurants		310	297
Franchised units
Franchisor Disclosure [Line Items]
Number of restaurants		241	247
Franchised units | GUAM
Franchisor Disclosure [Line Items]
Number of restaurants		1	1