GOODWILL AND OTHER INTANGIBLE ASSETS - Placement Fee Agreements (Details) - Contract rights under placement fee agreements - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Placement fee agreements
Payment advances made under placement fee agreements	$ 3.0	$ 1.0
Minimum
Placement fee agreements
General term of the agreement	12 months
Maximum
Placement fee agreements
General term of the agreement	83 months