GOODWILL AND INTANGIBLE ASSETS - Other Intangible Assets, Net, by Major Class (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 25, 2016	Dec. 31, 2015
Intangible Assets [Line Items]
Total other intangible assets, net, excluding accumulated amortization	$ 179,430	$ 125,663
Less: accumulated amortization	(28,584)	(18,904)
Other intangible assets, net	150,846	106,759
Customer Relationships [Member]
Intangible Assets [Line Items]
Other finite-lived intangible assets, gross	$ 128,364	$ 91,164
Intangible assets, weighted average useful life	10 years 73 days	10 years 146 days
Noncompete Agreements [Member]
Intangible Assets [Line Items]
Other finite-lived intangible assets, gross	$ 13,120	$ 9,012
Intangible assets, weighted average useful life	3 years 256 days	3 years 146 days
Trademarks [Member]
Intangible Assets [Line Items]
Other indefinite-lived intangible assets, gross	$ 37,946	$ 25,487