Stock Compensation - SARs and Option Awards Activity (Details) (Stock Appreciation Rights SARS and Stock Option [Member], USD $)	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
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)	396,174	439,863	573,000
Granted (shares)	126,532	116,032	118,107
Exercised (shares)	(98,942)	(159,721)	(251,240)
Forfeited (shares)	(46,782)	0	(4)
Outstanding at end of year (shares)	376,982	396,174	439,863
Exercisable at end of year (shares)	204,107	153,343	115,395
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)	$ 26.64	$ 19.12	$ 15.46
Granted, Weighted Average Exercise Price (usd per share)	$ 43.92	$ 45.20	$ 25.77
Exercised, Weighted Average Exercise Price (usd per share)	$ 22.79	$ 19.19	$ 13.84
Forfeited, Weighted Average Exercise Price (usd per share)	$ 44.14	$ 0.00	$ 2.11
Outstanding at end of year, Weighted Average Exercise Price (usd per share)	$ 31.27	$ 26.64	$ 19.12
Exercisable at end of year, Weighted Average Exercise Price (usd per share)	$ 21.55	$ 15.32	$ 13.14
Weighted average fair value for the fiscal year indicated of options and SARs granted during such year (usd per share)	$ 16.94	$ 13.68	$ 8.81