Commitments and Contingencies - Additional Information (Detail)	12 Months Ended
	Dec. 28, 2016 USD ($) Agreement Lawsuit Lease
Other Commitments [Line Items]
Date of class action filed in court	On or about February 24, 2014
Number of lawsuits consolidated | Lawsuit	2
Call option value reduced from menu	$ 5
Officers [Member]
Other Commitments [Line Items]
Number of at-will employment agreements | Agreement	4
Property Lease Guarantee [Member]
Other Commitments [Line Items]
Number of leases assigned to franchisees | Lease	4
Latest lease expiration year	2036
Contingent lease obligations, maximum exposure	$ 1,100,000
Contingent lease obligations, maximum exposure, if discounted at estimated pre-tax cost of debt	1,000,000
Beverage [Member]
Other Commitments [Line Items]
Purchase commitments, estimated obligations	7,500,000
Chicken Acquisition Corp [Member]
Other Commitments [Line Items]
Purchase commitments, estimated obligations	$ 40,500,000