SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Allowance For Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 4,900	$ 2,525	$ 4,056
Additions, Charged to Operating Results	114	1,060	520
Additions, Charged to Other Accounts	0	1,314	0
Deductions	451	(1)	2,051
Ending Balance	4,563	4,900	2,525
Allowance For Sales Adjustments [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	5,662	7,425	7,089
Additions, Charged to Operating Results	199,423	150,113	220,123
Additions, Charged to Other Accounts	0	0	0
Deductions	200,211	151,876	219,787
Ending Balance	4,874	5,662	7,425
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	7,921	9,150	10,400
Additions, Charged to Operating Results	0	0	(1,250)
Additions, Charged to Other Accounts	0	0	0
Deductions	(1,689)	(1,229)	0
Ending Balance	$ 6,232	$ 7,921	$ 9,150