Significant Accounting Policies – Recent Accounting Pronouncements and Subsequent Events (Details)		2 Months Ended	12 Months Ended
	Feb. 03, 2019 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) shares	Dec. 25, 2016 USD ($)	Dec. 30, 2018 $ / shares	Dec. 31, 2017 $ / shares
Subsequent Events
Preferred stock, par value | $ / shares				$ 0.01	$ 0.01
Subsequent events | Securities Purchase Agreement | Series B Preferred Stock
Subsequent Events
Number of shares sold | shares	200,000
Preferred stock, par value | $ / shares	$ 0.01
Purchase price per share | $ / shares	$ 1,000
Aggregate purchase price of shares	$ 200,000,000
Conversion rate denominator	50.06
Initial dividend rate	3.60%
Maximum | Subsequent events | Securities Purchase Agreement | Series B Preferred Stock
Subsequent Events
Number of shares sold | shares		50,000
Maximum | Subsequent events | Securities Purchase Agreement | Series B Preferred Stock | Franchisee
Subsequent Events
Number of shares sold | shares	10,000
Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional operating lease liabilities		$ 210,000,000
Accounting Standards Update 2016-09 | Restatement
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in net cash provided by operating activities due to retrospective application of ASU 2016-09			$ 6,200,000
Increase in net cash used in financing activities due to retrospective application of ASU 2016-09			$ 6,200,000