Derivative Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2017	Nov. 30, 2016
Derivative [Line Items]
Total, Fair Value	$ (18)	$ (770)	$ (18)	$ (770)
Notional value of foreign currency forward contracts not designated as hedges	55,604	41,614	55,604	41,614
Amount of unrealized gain (loss) recognized in income on derivatives	(369)	(627)	328	777
Other current assets
Derivative [Line Items]
Assets—foreign currency forward contracts not designated as hedges	156	132	156	132
Notional value of foreign currency forward contracts not designated as hedges, assets	20,394	25,849	20,394	25,849
Accounts payable and accrued expenses
Derivative [Line Items]
Liabilities—foreign currency forward contracts not designated as hedges	(174)	(902)	(174)	(902)
Notional value of foreign currency forward contracts not designated as hedges, liabilities	35,210	15,765	35,210	15,765
Derivative Liabilities | Other expense, net
Derivative [Line Items]
Amount of unrealized gain (loss) recognized in income on derivatives	(678)	(1,182)	(1,261)	(2,181)
Derivative Assets | Other expense, net
Derivative [Line Items]
Amount of unrealized gain (loss) recognized in income on derivatives	$ 309	$ 555	$ 1,589	$ 2,958