Commitments and Contingencies - Additional Information (Details)	3 Months Ended
	Mar. 27, 2019 USD ($) lawsuit agreement lease	Mar. 28, 2018 USD ($)
Other Commitments [Line Items]
Date of class action filed in court	On or about February 24, 2014
Number of lawsuits consolidated | lawsuit	2
Accrual associated with loss contingencies	$ 0
Employment agreement expense	$ 300,000	$ 400,000
Officers
Other Commitments [Line Items]
Number of at-will employment agreements | agreement	4
Property Lease Guarantee
Other Commitments [Line Items]
Number of leases assigned to franchisees | lease	5
Latest lease expiration year	2036
Contingent lease obligations, maximum exposure	$ 2,300,000
Contingent lease obligations, maximum exposure, if discounted at estimated pre-tax cost of debt	1,900,000
Chicken
Other Commitments [Line Items]
Purchase commitments, estimated obligations	22,800,000
Impact Damages
Other Commitments [Line Items]
Value of damages awarded	4,356,600
Lost Opportunity Damages
Other Commitments [Line Items]
Value of damages awarded	4,481,206
Total Damages
Other Commitments [Line Items]
Value of damages awarded	$ 8,837,806