FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Nov. 16, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration on acquisition date	$ 31,800,000		$ 23,100,000
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at December 31, 2016	23,100,000
Change in fair value of contingent consideration	8,746,000	$ 0
Balance at March 31, 2017	$ 31,846,000
Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration on acquisition date			0
Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration on acquisition date			$ 45,000,000