GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Components of Amortizing Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 179,119	$ 123,941
AccumulatedAmortization	(99,934)	(98,275)
Acquired and developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	68,269	52,825
AccumulatedAmortization	(48,766)	(48,063)
Customer relationships, trade names and noncompete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	110,850	71,116
AccumulatedAmortization	$ (51,168)	$ (50,212)