Long-Term Incentives - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 31, 2013	Feb. 28, 2013
Schedule Of Other Liabilities Noncurrent [Line Items]
Long-Term incentives	$ 2,066	$ 2,652
Accrued Expenses	4,190	5,799
Phantom Stock Liability
Schedule Of Other Liabilities Noncurrent [Line Items]
Long-Term incentives	2,100	2,700
Redemption period	5 years
Number of preceding trading days used in calculation of redemption amount	30 days
Accrued Expenses	$ 900
Redemption period current	1 year