GOODWILL AND OTHER INTANGIBLE ASSETS - Rollforward of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Finite-lived and Indefinite-lived Intangible Assets [Roll Forward]
Beginning of period			$ 909,645	$ 720,035	$ 720,035
Intangible assets acquired during the year			70,282		277,041
Impairments during the year			(2,414)		(9,863)
Amortization during the year	$ (9,239)	$ (8,497)	(26,957)	$ (24,214)	(32,692)
Changes due to foreign currency fluctuations			(41,053)		(44,876)
End of period	$ 909,503		$ 909,503		$ 909,645