Acquisition (Details) $ / shares in Units, $ in Thousands				3 Months Ended		21 Months Ended
	Aug. 20, 2019 USD ($)	Jun. 11, 2019 USD ($)	Apr. 30, 2019 USD ($) restaurant director $ / shares shares	Mar. 29, 2020 USD ($) restaurant shares	Mar. 31, 2019 USD ($)	Sep. 29, 2019 restaurant	Dec. 29, 2019 USD ($)
Business Acquisition [Line Items]
Right of First Refusal, Number of States				20
Number of Restaurants Acquired				234
Business acquisitions, purchase price				$ 275,979
Proceeds from sale-leaseback transactions				13,685	$ 2,302
Restaurant sales				351,518	$ 290,789
Goodwill				122,619			$ 122,619
April 30, 2019 Acquisition 2 [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired			220
Business acquisitions, purchase price			$ 259,083
June 11, 2019 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired		13
Business acquisitions, purchase price		$ 15,788
August 20, 2019 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired	1
Business acquisitions, purchase price	$ 1,108
Agreement And Plan Of Merger - Cambridge Holdings, LLC [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired | restaurant			132
Business acquisition, equity interest issued or issuable, number of shares | shares			7,400,000
Business Combination, Restrictions On Stock, Term Of Restrictions On Sale Or Transfer			2 years
Business Combination, Number Of Director Nominees That May Be Designated By Counterparty | director			2
Business Combination, Consideration Transferred			$ 259,100
Number of Restaurants Constructed | restaurant			33
Goodwill							84,060
Deferred income taxes							44,292
2019 Acquisition [Member]
Business Acquisition [Line Items]
Business Acquisition, Goodwill, Expected Tax Deductible Amount							$ 47,200
Goodwill				86
Deferred income taxes				29
Acquired Restaurants [Member]
Business Acquisition [Line Items]
Restaurant sales				$ 68,700
Cambridge Holdings, LLC [Member] | Agreement And Plan Of Merger - Cambridge Holdings, LLC [Member]
Business Acquisition [Line Items]
Retirement of Outstanding Indebtedness			$ 113,800
Common Stock [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price, Conversion, Closing Price | $ / shares			$ 9.81
Common Stock [Member] | Agreement And Plan Of Merger - Cambridge Holdings, LLC [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred			$ 145,300
Burger King Corporate [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired | restaurant				165		179
Popeyes [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired | restaurant						55
Cambridge Holdings, LLC [Member] | Series C Preferred Stock [Member]
Business Acquisition [Line Items]
Issuance (in shares) | shares				10,000
Conversion of Stock, Shares Converted | shares				7,500,000