Cash and Receivables Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts Receivable
Balance at beginning of year; Current	$ 4,939	$ 4,546	$ 4,030
Balance at beginning of year; Non-current	2,000	0	26
Provision for doubtful accounts; Franchisees and other	3,294	2,562	579
Uncollectible accounts written-off, net of recoveries	(214)	(169)	(89)
Balance at end of year; Current	10,019	4,939	4,546
Balance at end of year; Non-current	0	2,000	0
Balance at end of year; Total	$ 10,019	$ 6,939	$ 4,546