Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 27, 2018 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Commitments related to new restaurants	$ 12.0
Commitments description	In connection with the build out of the restaurants, the Company may be obligated for a portion of the start-up and/or construction costs.