Consolidated Statement of Shareholders' Equity (Unaudited) (USD $)	Total	Stock Appreciation Rights (SARs) [Member]	Common Stock	Common Stock Stock Appreciation Rights (SARs) [Member]	Capital in Excess of Par Value	Capital in Excess of Par Value Stock Appreciation Rights (SARs) [Member]	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at Feb. 28, 2013	$ 333,934,474		$ 25,376,967		$ 17,653,912		$ 294,092,945	$ (3,189,350)
Balance (shares) at Feb. 28, 2013			25,376,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Compensation (shares)			14,000
Stock Compensation	2,988,596		14,000		2,974,596
Restricted Stock Units (shares)			27,684
Restricted Stock Units	(565,527)		27,684		(593,211)
Stock Issued for SARs, Shares				56,665
Stock Issued for SARs		(958,649)		56,665		(1,015,314)
Employee Stock Purchase Plan (shares)			62,949
Employee Stock Purchase Plan	1,582,446		62,949		1,519,497
Federal Income Tax Deducted on Stock Options and SARs	1,216,428				1,216,428
Cash Dividend Paid	(10,709,629)						(10,709,629)
Net Income	49,354,707						49,354,707
Foreign Currency Translation	(2,305,648)							(2,305,648)
Interest Rate Swap, Net of $21,903 Income Tax	(40,678)							(40,678)
Balance at Nov. 30, 2013	$ 374,496,520		$ 25,538,265		$ 21,755,908		$ 332,738,023	$ (5,535,676)
Balance (shares) at Nov. 30, 2013			25,538,265