GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,174,593	$ 1,168,106
Accumulated Amortization	(195,024)	(132,666)
Net	979,569	1,035,440
Developed technology
Finite-Lived Intangible Assets [Line Items]
Cost	254,871	253,249
Accumulated Amortization	(90,131)	(69,810)
Net	164,740	183,439
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	834,752	834,091
Accumulated Amortization	(74,030)	(42,526)
Net	760,722	791,565
Distributor relationships
Finite-Lived Intangible Assets [Line Items]
Cost	7,342	5,348
Accumulated Amortization	(2,072)	(1,633)
Net	5,270	3,715
Definite lived trademark and trade names
Finite-Lived Intangible Assets [Line Items]
Cost	43,948	43,964
Accumulated Amortization	(8,814)	(5,511)
Net	35,134	38,453
Core technology
Finite-Lived Intangible Assets [Line Items]
Cost	7,163	7,169
Accumulated Amortization	(5,090)	(4,659)
Net	2,073	2,510
Net beneficial leases
Finite-Lived Intangible Assets [Line Items]
Cost	336	336
Accumulated Amortization	(336)	(336)
Net	0	0
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Cost	287	288
Accumulated Amortization	(287)	(288)
Net	0	0
Leasehold interest
Finite-Lived Intangible Assets [Line Items]
Cost	2,600	2,600
Accumulated Amortization	(707)	(416)
Net	1,893	2,184
Backlog
Finite-Lived Intangible Assets [Line Items]
Cost	18,234	18,245
Accumulated Amortization	(12,487)	(6,750)
Net	5,747	11,495
Capitalized software
Finite-Lived Intangible Assets [Line Items]
Cost	2,856	1,625
Accumulated Amortization	(159)	0
Net	2,697	1,625
Technical licenses
Finite-Lived Intangible Assets [Line Items]
Cost	1,000
Accumulated Amortization	(83)
Net	917
Other
Finite-Lived Intangible Assets [Line Items]
Cost	1,204	1,191
Accumulated Amortization	(828)	(737)
Net	$ 376	$ 454