Divestitures - Divestitures (Details) $ in Thousands			9 Months Ended
	Sep. 30, 2019 USD ($) restaurant	Aug. 01, 2019 USD ($) item restaurant	Sep. 29, 2019 USD ($) lease
Number of domestic leases for which the Company is contingently liable | lease			103
Estimated maximum amount of undiscounted payments in the event of nonpayment by primary lessees			$ 14,800
Stores in Macon, GA
Number of restaurants divested | restaurant		19
Total consideration for asset sale of restaurants		$ 5,600
Gain (loss) on assets transferred to held for sale		$ 1,700
Number of domestic leases for which the Company is contingently liable | item		19
Stores in South Florida
Number of restaurants divested | restaurant	23
Total consideration for asset sale of restaurants	$ 7,500
Gain (loss) on assets transferred to held for sale			$ 0
Maximum | Stores in Macon, GA
Estimated maximum amount of undiscounted payments in the event of nonpayment by primary lessees		$ 5,700