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

12 Months Ended

Aug. 31, 2013

Earnings Per Share [Abstract]

Schedule of Stock by Class [Table Text Block]

Years Ended August 31,	2013			2012			2011
Balance, beginning of year (September 1)		44,279			45,055			46,024
Common stock issued for employee stock plans		2,459			825			1,283
Stock issued for acquisition of business		-			43			-
Repurchase of common stock		(3,414	)		(1,644	)		(2,252	)
Balance, end of year (August 31)		43,324			44,279			45,055

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,	2013		2012			2011	2013		2012		2011		2013		2012		2011
Basic EPS
Income available to common stockholders	$	198,637	$	188,809	$	171,046		43,890		44,784		45,953	$	4.53	$	4.22	$	3.72
Diluted EPS
Dilutive effect of stock options and restricted stock								734		1,026		1,402
Income available to common stockholders plus assumed conversions	$	198,637	$	188,809	$	171,046		44,624		45,810		47,355	$	4.45	$	4.12	$	3.61