Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	$ 10,733	$ 9,707	$ 8,966
Charged to costs and expenses		(378)	658
Recovered from costs and expenses	3,007
Additions	(71)	1,404
Deductions			83
Balance at End of Year	13,669	10,733	9,707
Reserve for uncollectible accounts receivable
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	2,271	1,486	2,447
Charged to costs and expenses	5,154	1,744	659
Deductions	(5,308)	(959)	(1,620)
Balance at End of Year	2,117	2,271	1,486
Reserve for franchisee notes receivable
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	1,047	2,759	3,653
Recovered from costs and expenses	(393)	(1,715)	(250)
Additions	2,715		(644)
Deductions		3
Balance at End of Year	3,369	1,047	2,759
Valuation allowance on deferred tax assets
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	7,415	5,462	2,866
Charged to costs and expenses		(407)
Recovered from costs and expenses	(1,754)		249
Additions	2,522	2,360	2,347
Balance at End of Year	$ 8,183	$ 7,415	$ 5,462