Identifiable Intangible Assets - Schedule of Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands	Nov. 30, 2017	Feb. 28, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 423,365	$ 383,280
Accumulated Amortization	(271,915)	(245,513)
Net Amount	151,450	137,767
Trademarks, copyrights and patents
Finite-Lived Intangible Assets [Line Items]
Gross Amount	162,818	148,850
Accumulated Amortization	(67,838)	(59,440)
Net Amount	94,980	89,410
Purchased technologies
Finite-Lived Intangible Assets [Line Items]
Gross Amount	130,235	107,078
Accumulated Amortization	(90,143)	(80,536)
Net Amount	40,092	26,542
Customer and reseller relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	105,810	104,438
Accumulated Amortization	(93,703)	(88,046)
Net Amount	12,107	16,392
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Amount	15,669	14,081
Accumulated Amortization	(14,036)	(12,329)
Net Amount	1,633	1,752
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Amount	8,833	8,833
Accumulated Amortization	(6,195)	(5,162)
Net Amount	$ 2,638	$ 3,671