GOODWILL & INTANGIBLE ASSETS Schedule of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Cost	$ 81,457	$ 79,724
Accumulated Amortization	(41,544)	(34,497)
Net	39,913	45,227
Developed technology
Finite-Lived Intangible Assets [Line Items]
Cost	31,946	30,848
Accumulated Amortization	(23,524)	(21,343)
Net	8,422	9,505
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	38,801	38,718
Accumulated Amortization	(14,046)	(11,038)
Net	24,755	27,680
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	2,014	1,895
Accumulated Amortization	(568)	(219)
Net	1,446	1,676
Core technology
Finite-Lived Intangible Assets [Line Items]
Cost	7,572	7,446
Accumulated Amortization	(2,701)	(1,455)
Net	4,871	5,991
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Cost	355	334
Accumulated Amortization	(295)	(167)
Net	60	167
Other
Finite-Lived Intangible Assets [Line Items]
Cost	769	483
Accumulated Amortization	(410)	(275)
Net	$ 359	$ 208