Related Parties (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015 USD ($) Rate shares	Jun. 29, 2014 USD ($)	Jun. 28, 2015 USD ($) Rate shares	Jun. 29, 2014 USD ($)	Dec. 28, 2014 shares	May. 30, 2012 shares
Related Party Transaction [Line Items]
Preferred stock, shares issued | shares	100		100		100	100
Convertible Preferred Stock, Common Shares Issuable upon Conversion | shares						9,414,580
Preferred stock, ownership percentage if converted | Rate	21.00%		21.00%
Initial Franchise Fees			$ 50
Franchise Term			20 years
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Operating Leases, Rent Expense	$ 7,300	$ 6,500	$ 14,600	$ 12,900
Board of directors, number of members	2		2
Other Liabilities [Member]
Related Party Transaction [Line Items]
Liabilities due to BKC	$ 1,300		$ 1,300
Accounts Payable [Member]
Related Party Transaction [Line Items]
Liabilities due to BKC	$ 6,200		$ 6,200