Note 11 - Common Stock and Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		1 Months Ended	9 Months Ended
	May 05, 2014	May 31, 2014 Equity Option [Member]	May 31, 2013 Equity Option [Member]	May 31, 2014 Equity Option [Member]	May 31, 2013 Equity Option [Member]	May 31, 2014 Performance-Based Stock Options [Member]	May 31, 2013 Performance-Based Stock Options [Member]	May 31, 2014 Performance-Based Stock Options [Member]	May 31, 2013 Performance-Based Stock Options [Member]	Jun. 17, 2014 Subsequent Event [Member]	May 31, 2014 Per Annum [Member]
Note 11 - Common Stock and Earnings Per Share (Details) [Line Items]
Increase in Dividend Rate	11.00%
Common Stock, Dividends, Per Share, Cash Paid (in Dollars per share)	$ 0.39										$ 1.56
Dividends, Cash (in Dollars)										$ 16,400
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		49,571	464,874	35,147	457,569	1,389,674	1,886,622	1,389,674	1,886,622