Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	$ 8,966	$ 9,878	$ 15,387
Charged to costs and expenses	658	1,166
Recovered from costs and expenses			(2,955)
Additions	83
Deductions		(2,078)	(2,554)
Balance at End of Year	9,707	8,966	9,878
Reserve for uncollectible accounts receivable
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	2,447	3,814	4,318
Charged to costs and expenses	659	1,332	2,297
Deductions	(1,620)	(2,699)	(2,801)
Balance at End of Year	1,486	2,447	3,814
Reserve for franchisee notes receivable
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	3,653	3,132	3,387
Recovered from costs and expenses	(250)	(100)	(502)
Additions		621	247
Deductions	(644)
Balance at End of Year	2,759	3,653	3,132
Valuation allowance on foreign net operating losses
Movement in Valuation Allowances and Reserves
Balance at Beginning of Year	2,866	2,932	7,682
Charged to costs and expenses	249
Recovered from costs and expenses		(66)	(4,750)
Additions	2,347
Balance at End of Year	$ 5,462	$ 2,866	$ 2,932