FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Contingent Consideration Activities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Contingent Consideration Liability [Roll Forward]
Beginning balance	$ 17,342	$ 75,614	$ 22,426	$ 73,423
Payments	(17,109)	(40,555)	(17,109)	(42,776)
Fair value adjustments	767	(6,997)	(4,317)	(2,585)
Ending balance	$ 1,000	$ 28,062	$ 1,000	$ 28,062