FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Contingent Consideration (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Contingent considerations
Liabilities incurred		$ 40,600	$ 84,300
Deductions/ Write-Offs		7,122	12,221	$ 1,645
Activities related to contingent consideration
Beginning balance		73,423	4,500
Additions to accrual		0	84,261
Payments and settlements		(44,912)	(19,008)
Fair value adjustments		(6,085)	3,670
Ending balance		$ 22,426	73,423	$ 4,500
Nextracker
Contingent considerations
Liabilities incurred	$ 81,000
Activities related to contingent consideration
Ending balance	$ 97,200
Distressed Customer
Contingent considerations
Deductions/ Write-Offs			$ 19,000