Long-Term Debt - Additional Information (Detail) - USD ($)	9 Months Ended
	Nov. 30, 2015	Feb. 28, 2015	Nov. 30, 2014	Sep. 19, 2013
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, outstanding borrowings	$ 45,000,000	$ 106,500,000
Revolving credit facility, percentage of capital securities of direct foreign subsidiary	65.00%
Third Amendment [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, initiation date	Sep. 19, 2013
Minimum tangible net worth, amount				$ 100,000,000
Minimum tangible net worth percentage				25.00%
Third Amendment [Member] | Standby letters of credit [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, outstanding borrowings	$ 2,100,000
Revolving credit facility, remaining borrowing capacity	102,900,000
Second Amendment [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity	150,000,000
Revolving credit facility, additional borrowing capacity	$ 200,000,000
Revolving credit facility, maturity date	Aug. 18, 2016
Revolving credit facility, interest rate description	London Interbank Offered Rate ("LIBOR") plus a spread ranging from 1.0% to 2.25%, or 1.6%
Revolving credit facility, interest rate variable basis spread, option one	1.60%		1.70%
Revolving credit facility, interest rate variable basis spread, option two	1.25%		1.50%
Second Amendment [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, variable basis spread	1.00%
Second Amendment [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, variable basis spread	2.25%