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Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016	Feb. 28, 2017
Components of accumulated other comprehensive loss
Balance			$ 1,173
Tax effects	$ 593	$ (272)	963	$ (95)
Other comprehensive income (loss)	(1,943)	876	(4,120)	192
Balance	(2,947)		(2,947)		$ 1,173
Net deferred tax benefits (expense)	6,777	$ 2,571	18,951	$ 5,973
Accumulated other comprehensive income (loss)
Components of accumulated other comprehensive loss
Balance			1,173
Balance	$ (2,947)		(2,947)		1,173
Unrealized Holding Gains (Losses) On Cash Flow Hedges
Components of accumulated other comprehensive loss
Other comprehensive income before reclassification			(4,203)
Amounts reclassified out of accumulated other comprehensive income			(880)
Tax effects			963
Other comprehensive income (loss)			(4,120)
Unrealized Holding Gains (Losses) On Cash Flow Hedges | Foreign currency contracts
Components of accumulated other comprehensive loss
Net deferred tax benefits (expense)			$ 700		$ (200)

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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