Balance Sheet Information - Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands	May 31, 2016	Feb. 29, 2016	May 31, 2015	Feb. 28, 2015
Cash and Cash Equivalents [Abstract]
Cash	$ 70,678	$ 60,252
Money market funds	56,304	58,402
Total cash and cash equivalents	$ 126,982	$ 118,654	$ 156,062	$ 151,373