Long-Term Debt (Details Textual) (USD $)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Long-Term Debt (Additional Textual) [Abstract]
Interest expense related to construction	$ 0	$ 0	$ 1,700,000
Revolving credit facility [Member]
Long-Term Debt (Textual) [Abstract]
Revolving credit facility, outstanding borrowings	57,500,000	90,000,000
Standby letters of credit [Member]
Long-Term Debt (Textual) [Abstract]
Revolving credit facility, outstanding borrowings	4,100,000
Revolving credit facility, remaining borrowing capacity	88,400,000
Second Amendment [Member] | Revolving credit facility [Member]
Long-Term Debt (Textual) [Abstract]
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, interest rate variable basis spread, option one	1.50%	1.74%
Revolving credit facility, interest rate variable basis spread, option two	1.70%
Revolving credit facility, outstanding borrowings	$ 57,500,000
Revolving credit facility, percentage of capital securities of direct Foreign Subsidiary	65.00%
Second Amendment [Member] | Revolving credit facility [Member] | Maximum [Member]
Long-Term Debt (Textual) [Abstract]
Revolving credit facility, variable basis spread	2.25%
Second Amendment [Member] | Revolving credit facility [Member] | Minimum [Member]
Long-Term Debt (Textual) [Abstract]
Revolving credit facility, variable basis spread	1.00%