Balance Sheet Information - Deferred Costs (Detail) - USD ($) $ in Thousands	Aug. 31, 2017	Feb. 28, 2017
Deferred Cost [Line Items]
Total deferred costs	$ 64,452	$ 59,883
Appliance
Deferred Cost [Line Items]
Total deferred costs	40,561	39,474
Commissions
Deferred Cost [Line Items]
Total deferred costs	$ 23,891	$ 20,409