BUSINESS ACQUISITIONS - ChanTest, Additional Information (Details) - ChanTest - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Oct. 29, 2014	Dec. 26, 2015	Dec. 27, 2014
Business Acquisition [Line Items]
Purchase price	$ 59,200
Contingent consideration	300	$ 2,000
Gain on contingent consideration liability		$ 300
Purchase price allocation	52,029
Cash acquired	$ 7,200
Transaction and integration costs			$ 1,100