Consolidated Condensed Statement of Changes in Shareholders' Equity (unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014
Statement Of Stockholders Equity [Abstract]
Dividends declared per share (in dollars per share)	$ 0.16	$ 0.16	$ 0.16	$ 0.15	$ 0.15	$ 0.15