BUSINESS COMBINATIONS (Details) - Resort Advantage, LLC and Financial Crimes Enforcement Network - USD ($) $ in Millions	1 Months Ended
	Aug. 31, 2018	Aug. 31, 2015	Dec. 31, 2018
Business Acquisition [Line Items]
Payments to acquire businesses		$ 13.3
Contingent consideration, liability		$ 4.7
Contingent consideration, payment period		40 months
Contingent consideration, evaluation period		36 months
Contingent consideration arrangement, high range of outcome	$ 0.8
Contingent consideration arrangement, change in liability	$ (0.6)
Contingent consideration arrangement, low range of outcome			$ 0.2