Stock Compensation - SARs and Option Awards Activity (Details) (Stock Appreciation Rights SARS and Stock Option [Member], USD $)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Stock Appreciation Rights SARS and Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments, Number of Shares [Roll Forward]
Outstanding at beginning of year (shares)	573,000	831,518	950,282
Granted (shares)	118,107	193,132	322,792
Exercised (shares)	(251,240)	(413,814)	(433,394)
Forfeited (shares)	(4)	(37,836)	(8,162)
Outstanding at end of year (shares)	439,863	573,000	831,518
Exercisable at end of year (shares)	115,395	123,090	487,396
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding at beginning of year, Weighted Average Exercise Price (usd per share)	$ 15.46	$ 14.24	$ 10.93
Granted, Weighted Average Exercise Price (usd per share)	$ 25.77	$ 20.91	$ 16.12
Exercised, Weighted Average Exercise Price (usd per share)	$ 13.84	$ 15.10	$ 8.48
Forfeited, Weighted Average Exercise Price (usd per share)	$ 2.11	$ 19.88	$ 9.59
Outstanding at end of year, Weighted Average Exercise Price (usd per share)	$ 19.12	$ 15.46	$ 14.24
Exercisable at end of year, Weighted Average Exercise Price (usd per share)	$ 13.14	$ 12.11	$ 13.60
Weighted average fair value for the fiscal year indicated of options and SARs granted during such year (usd per share)	$ 8.81	$ 7.74	$ 6.27