Identifiable Intangible Assets - Schedule of Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands	May 31, 2019	Feb. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 528,857	$ 526,257
Accumulated Amortization	(329,943)	(320,174)
Net Amount	198,914	206,083
Trademarks, copyrights and patents
Finite-Lived Intangible Assets [Line Items]
Gross Amount	180,240	176,704
Accumulated Amortization	(86,132)	(82,967)
Net Amount	94,108	93,737
Purchased technologies
Finite-Lived Intangible Assets [Line Items]
Gross Amount	218,561	219,196
Accumulated Amortization	(118,705)	(113,617)
Net Amount	99,856	105,579
Customer and reseller relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	105,562	105,737
Accumulated Amortization	(102,047)	(100,947)
Net Amount	3,515	4,790
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Amount	15,661	15,787
Accumulated Amortization	(14,800)	(14,728)
Net Amount	861	1,059
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Amount	8,833	8,833
Accumulated Amortization	(8,259)	(7,915)
Net Amount	$ 574	$ 918