GOODWILL AND INTANGIBLE ASSETS - Intangible Assets, Net, by Major Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Total intangible assets, net, excluding accumulated amortization	$ 468,793	$ 315,065
Less: accumulated amortization	(85,811)	(51,598)
Intangible assets, net	382,982	263,467	$ 164,539
Trademarks [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross	82,358	60,448
Customer relationships [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 366,228	$ 238,043
Finite-lived intangible assets, useful life	10 years 1 month 6 days	10 years 2 months 12 days
Non-compete agreements [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 19,159	$ 15,564
Finite-lived intangible assets, useful life	4 years 10 months 12 days	4 years 2 months 12 days
Patents [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 1,048	$ 1,010
Finite-lived intangible assets, useful life	8 years 10 months 12 days	9 years 1 day