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

6 Months Ended

Feb. 28, 2014

Earnings Per Share [Abstract]

Schedule of Stock by Class [Table Text Block]

	Six Months Ended February 28,
	2014			2013
Balance at September 1		43,324			44,279
Common stock issued for employee stock plans		368			780
Repurchase of common stock		(1,330	)		(1,480	)
Balance at February 28, 2014 and 2013, respectively		42,362			43,579

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

	Net Income (Numerator)		Weighted Average Common Shares (Denominator)		Per Share Amount
For the three months ended February 28, 2014
Basic EPS
Income available to common stockholders	$	52,426		42,547	$	1.23
Diluted EPS
Dilutive effect of stock options and restricted stock				560
Income available to common stockholders plus assumed conversions	$	52,426		43,107	$	1.22
For the three months ended February 28, 2013
Basic EPS
Income available to common stockholders	$	44,539		43,813	$	1.02
Diluted EPS
Dilutive effect of stock options and restricted stock				642
Income available to common stockholders plus assumed conversions	$	44,539		44,455	$	1.00
For the six months ended February 28, 2014
Basic EPS
Income available to common stockholders	$	104,604		42,840	$	2.44
Diluted EPS
Dilutive effect of stock options and restricted stock				592
Income available to common stockholders plus assumed conversions	$	104,604		43,432	$	2.41
For the six months ended February 28, 2013
Basic EPS
Income available to common stockholders	$	94,307		44,065	$	2.14
Diluted EPS
Dilutive effect of stock options and restricted stock				723
Income available to common stockholders plus assumed conversions	$	94,307		44,788	$	2.11