Note 12 - Stockholders' Equity (Tables)

6 Months Ended

Feb. 28, 2015

Stockholders' Equity Note [Abstract]

Dividends Declared [Table Text Block]

Declaration Date	Dividends Per Share of Common Stock		Type	Record Date	Total $ Amount (in thousands)		Payment Date
February 11, 2015	$	0.39	Regular (cash)	February 27, 2015	$	16,236	March 17, 2015
November 12, 2014	$	0.39	Regular (cash)	November 28, 2014	$	16,216	December 16, 2014
August 14, 2014	$	0.39	Regular (cash)	August 29, 2014	$	16,299	September 16, 2014
May 5, 2014	$	0.39	Regular (cash)	May 30, 2014	$	16,386	June 17, 2014
February 11, 2014	$	0.35	Regular (cash)	February 28, 2014	$	14,827	March 18, 2014
November 14, 2013	$	0.35	Regular (cash)	November 29, 2013	$	15,046	December 17, 2013
August 15, 2013	$	0.35	Regular (cash)	August 31, 2013	$	15,164	September 17, 2013