Related Parties (Details) $ in Thousands	3 Months Ended
	Apr. 01, 2018 USD ($) Rate shares	Dec. 31, 2017 shares
Related Party Transaction [Line Items]
Preferred stock, shares issued | shares	100	100
Board of directors, number of members	2
Franchise Agreement, Term	20 years
Accounts payable to BKC	$ 8,400
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Preferred stock, ownership percentage if converted | Rate	20.50%
Initial Franchise Fees	$ 50
Franchise Term	20 years
Property leases	247
BKC Subleases with third-party lessor [Member] | Affiliated Entity [Member]
Related Party Transaction [Line Items]
Property leases	121