GOODWILL AND OTHER INTANGIBLE ASSETS - Rollforward of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Finite-lived and Indefinite-lived Intangible Assets [Roll Forward]
Beginning of period			$ 1,842,561	$ 909,645	$ 909,645
Intangible assets acquired during the year	$ 18,853				1,016,775
Valuation adjustments for prior year acquisitions	294,792				35,241
Impairments during the year					(4,177)
Amortization during the year	(50,909)	$ (8,921)	(69,183)	$ (17,718)	(45,498)
Changes due to foreign currency fluctuations			(8,789)		(69,425)
End of period	$ 2,078,234		$ 2,078,234		$ 1,842,561