Long-Term Debt - Additional Information (Detail) (USD $)				3 Months Ended		3 Months Ended
	May 31, 2013 Revolving Credit Facility [Member]	Feb. 28, 2013 Revolving Credit Facility [Member]	May 31, 2013 Standby letters of credit [Member]	May 31, 2013 Second Amendment [Member] Revolving Credit Facility [Member]	May 31, 2012 Second Amendment [Member] Revolving Credit Facility [Member]	May 31, 2013 Second Amendment [Member] Revolving Credit Facility [Member] Minimum [Member]	May 31, 2013 Second Amendment [Member] Revolving Credit Facility [Member] Maximum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, initiation date				Feb. 22, 2012
Revolving credit facility, maximum borrowing capacity				$ 150,000,000
Revolving credit facility, additional borrowing capacity				200,000,000
Revolving credit facility, maturity date				Aug. 16, 2016
Revolving credit facility, interest rate description				London Interbank Offered Rate ("LIBOR") plus a spread ranging from 1.0% to 2.25%
Revolving credit facility, variable basis spread						1.00%	2.25%
Revolving credit facility, interest rate variable basis spread, option one				1.50%	1.74%
Revolving credit facility, interest rate variable basis spread, option two				1.69%
Revolving credit facility, outstanding borrowings	45,000,000	57,500,000	4,100,000
Revolving credit facility, remaining borrowing capacity			$ 100,900,000
Revolving credit facility, percentage of capital securities of direct Foreign Subsidiary	65.00%