Note 11 - Common Stock and Earnings Per Share (Details) - Shares of Common Stock Outstanding	9 Months Ended
	May 31, 2014	May 31, 2013
Shares of Common Stock Outstanding [Abstract]
Balance at September 1	43,324,410	44,279,000
Common stock issued for employee stock plans	562,000	1,775,000
Repurchase of common stock	(1,870,000)	(2,016,000)
Balance at May 31, 2014 and 2013, respectively	42,016,212	44,038,000