FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Contingent Consideration Activities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Contingent Consideration Liability [Roll Forward]
Beginning balance	$ 75,614	$ 4,500	$ 73,423	$ 4,500
Additions to accrual	0	81,000	0	81,000
Payments	(40,555)	0	(42,776)	0
Fair value adjustments	(6,997)	4,000	(2,585)	4,000
Ending balance	$ 28,062	89,500	$ 28,062	$ 89,500
Nextracker
Contingent Consideration Liability [Roll Forward]
Additions to accrual		$ 81,000