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Stock Compensation - Share-based Compensation and Income Taxes (Details) (USD $)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Share based compensation expense and related income tax benefits
Compensation Expense	$ 3,175,050	$ 2,927,917	$ 3,146,002
Income tax benefits	$ 1,111,268	$ 1,024,771	$ 1,101,101

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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