Note 11 - Common Stock and Earnings Per Share (Tables)

3 Months Ended

Nov. 30, 2013

Earnings Per Share [Abstract]

Schedule of Stock by Class [Table Text Block]

	Three Months Ended November 30,
	2013			2012
Balance at September 1		43,324			44,279
Common stock issued for employee stock plans		194			333
Repurchase of common stock under the share repurchase program		(530	)		(270	)
Balance at November 30, 2013 and 2012, respectively		42,988			44,342

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

	NetIncome (Numerator)		Weighted Average Common Shares (Denominator)		Per Share Amount
For the three months ended November 30, 2013
Basic EPS
Income available to common stockholders	$	52,178		43,134	$	1.21
Diluted EPS
Dilutive effect of stock options and restricted stock				639
Income available to common stockholders plus assumed conversions	$	52,178		43,773	$	1.19
For the three months ended November 30, 2012
Basic EPS
Income available to common stockholders	$	49,769		44,316	$	1.12
Diluted EPS
Dilutive effect of stock options and restricted stock				668
Income available to common stockholders plus assumed conversions	$	49,769		44,984	$	1.11