Note 12 - Common Stock and Earnings Per Share (Tables)

12 Months Ended

Aug. 31, 2014

Earnings Per Share [Abstract]

Schedule of Stock by Class [Table Text Block]

Years Ended August 31,	2014			2013			2012
Balance, beginning of year (September 1)		43,324			44,279			45,055
Common stock issued for employee stock plans		959			2,459			825
Stock issued for acquisition of business		-			-			43
Repurchase of common stock		(2,490	)		(3,414	)		(1,644	)
Balance, end of year (August 31)		41,793			43,324			44,279

Schedule of Weighted Average Number of Shares [Table Text Block]

	Net Income (Numerator)						Weighted Average Common Shares (Denominator)						Per Share Amount
Years Ended August 31,	2014		2013		2012		2014		2013		2012		2014		2013		2012
Basic EPS
Income available to common stockholders	$	211,543	$	198,637	$	188,809		42,436		43,890		44,784	$	4.98	$	4.53	$	4.22
Diluted EPS
Dilutive effect of stock options and restricted stock								534		734		1,026
Income available to common stockholders plus assumed conversions	$	211,543	$	198,637	$	188,809		42,970		44,624		45,810	$	4.92	$	4.45	$	4.12