Comprehensive Iincome (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015	Feb. 29, 2016
Components of accumulated other comprehensive loss
Balance			$ 665
Tax effects	$ (297)	$ (170)	(392)	$ (345)
Other comprehensive income (loss)	1,230	1,408	1,422	1,805
Balance	2,087		2,087		$ 665
Net deferred tax benefits (expense)	(2,740)	$ 2,414	(8,713)	$ (2,498)
Unrealized Holding Gains (Losses) On Cash Flow Hedges | Foreign currency contracts
Components of accumulated other comprehensive loss
Balance			665
Other comprehensive income before reclassification			2,319
Amounts reclassified out of accumulated other comprehensive income (loss)			(505)
Tax effects			(392)
Other comprehensive income (loss)			1,422
Balance	$ 2,087		2,087		665
Net deferred tax benefits (expense)			$ (390)		$ 0