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 |