Commitments and Contingencies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015 USD ($) Lease Agreement
Other Commitments [Line Items]
Date of class action filed in court	On or about February 24, 2014
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	2022
Contingent lease obligations, maximum exposure	$ 1,431,000
Contingent lease obligations, maximum exposure, if discounted at estimated pre-tax cost of debt	1,308,000
Beverage [Member]
Other Commitments [Line Items]
Purchase commitments, estimated obligations	15,200,000
Chicken Acquisition Corp [Member]
Other Commitments [Line Items]
Purchase commitments, estimated obligations	$ 12,600,000