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

6 Months Ended

Feb. 28, 2015

Earnings Per Share [Abstract]

Schedule of Stock by Class [Table Text Block]

	Six Months Ended February 28,
	2015			2014
Balance at September 1		41,793			43,324
Common stock issued for employee stock plans		604			389
Stock issued for acquisition of a business		20			0
Repurchase of common stock from employees*		(17	)		(21	)
Repurchase of common stock under the share repurchase program		(770	)		(1,330	)
Balance at February 28, 2015 and 2014, respectively		41,630			42,362

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

			Weighted
			Average
	Net Income		Common Shares		Per Share
	(Numerator)		(Denominator)		Amount
For the three months ended February 28, 2015
Basic EPS
Income available to common stockholders	$	61,598		41,630	$	1.48
Diluted EPS
Dilutive effect of stock options and restricted stock				676
Income available to common stockholders plus assumed conversions	$	61,598		42,306	$	1.46
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 six months ended February 28, 2015
Basic EPS
Income available to common stockholders	$	117,458		41,658	$	2.82
Diluted EPS
Dilutive effect of stock options and restricted stock				666
Income available to common stockholders plus assumed conversions	$	117,458		42,324	$	2.78
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