SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 6) - USD ($)	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating income	$ 266,432,000	$ 243,504,000	$ 131,695,000
Retained earnings	1,954,344,000	$ 1,874,722,000
Pro Forma | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales	52,000,000
Operating income	13,100,000
Retained earnings	$ 9,800