Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Quarterly Financial Data Table
Revenues	$ 427,191	$ 437,880	$ 435,348	$ 408,583	$ 397,820	$ 400,550	$ 411,002	$ 380,564	$ 1,709,002	$ 1,589,936	$ 1,223,408
Cost of sales	151,434	152,425	151,092	142,579	138,867	139,348	138,154	132,219	597,530	548,588	517,935
Operating profit	36,717	79,023	80,573	66,266	45,799	77,348	71,483	55,262	262,579	249,892	214,758
Net Income	$ 26,533	$ 46,127	$ 32,386	$ 31,894	$ 18,831	$ 391,249	$ 29,876	$ 20,159	$ 136,940	$ 460,115	$ 194,029
Basic income per share
Basic income per share	$ 0.12	$ 0.20	$ 0.14	$ 0.14	$ 0.08	$ 1.65	$ 0.13	$ 0.08	$ 0.60	$ 1.93	$ 0.79
Diluted income per share
Diluted income per share	$ 0.11	$ 0.20	$ 0.14	$ 0.14	$ 0.08	$ 1.60	$ 0.12	$ 0.08	$ 0.58	$ 1.88	$ 0.77
Investment income, net	$ 24,599					$ 450,133			$ 25,598	$ 450,736	$ 2,703
Franchise support and other costs	16,400								43,686	25,203	16,325
Reorganization and realignment costs	12,194				$ 2,377	$ 941	$ 3,124	$ 2,626	16,965	9,068	22,574
Loss on early extinguishment of debt	$ 1,346		$ 7,150					$ 11,475	$ 8,496	$ 11,475	$ 0
Loss Contingency Accrual, Estimate of Possible Loss					$ 27,500