GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,166,094	$ 1,168,106
Accumulated Amortization	(225,652)	(132,666)
Net	940,442	1,035,440
Developed technology
Finite-Lived Intangible Assets [Line Items]
Cost	253,105	253,249
Accumulated Amortization	(99,665)	(69,810)
Net	153,440	183,439
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	828,592	834,091
Accumulated Amortization	(89,384)	(42,526)
Net	739,208	791,565
Distributor relationships
Finite-Lived Intangible Assets [Line Items]
Cost	7,237	5,348
Accumulated Amortization	(2,366)	(1,633)
Net	4,871	3,715
Definite-lived trademark and trade name
Finite-Lived Intangible Assets [Line Items]
Cost	43,681	43,964
Accumulated Amortization	(10,394)	(5,511)
Net	33,287	38,453
Core technology
Finite-Lived Intangible Assets [Line Items]
Cost	7,052	7,169
Accumulated Amortization	(5,785)	(4,659)
Net	1,267	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	269	288
Accumulated Amortization	(269)	(288)
Net	0	0
Leasehold interest
Finite-Lived Intangible Assets [Line Items]
Cost	2,600	2,600
Accumulated Amortization	(852)	(416)
Net	1,748	2,184
Backlog
Finite-Lived Intangible Assets [Line Items]
Cost	18,045	18,245
Accumulated Amortization	(15,205)	(6,750)
Net	2,840	11,495
Capitalized software
Finite-Lived Intangible Assets [Line Items]
Cost	2,971	1,625
Accumulated Amortization	(368)	0
Net	2,603	1,625
Technical licenses
Finite-Lived Intangible Assets [Line Items]
Cost	1,000
Accumulated Amortization	(167)
Net	833
Other
Finite-Lived Intangible Assets [Line Items]
Cost	1,206	1,191
Accumulated Amortization	(861)	(737)
Net	$ 345	$ 454