GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Carrying Amount of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-lived and Indefinite-lived Intangible Assets [Roll Forward]
Beginning of period				$ 1,842,561				$ 909,645	$ 1,842,561	$ 909,645
Intangible assets acquired during the year									35,564	1,016,775
Valuation adjustments for prior year acquisitions									168,979	35,241
Intangible write-offs due to disposition and assets held for sale									(15,961)
Impairments during the year									(1,406)	(4,177)
Amortization during the year	$ (26,989)	$ (33,128)	$ (50,909)	$ (18,274)	$ (18,541)	$ (9,239)	$ (8,921)	$ (8,797)	(129,300)	(45,498)	$ (32,692)
Changes due to foreign currency fluctuations									(38,464)	(69,425)
End of period	$ 1,861,973				$ 1,842,561				$ 1,861,973	$ 1,842,561	$ 909,645