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Consolidated Statements of Changes in Shareholders' Equity (Parentheticals) - $ / shares	3 Months Ended			6 Months Ended			9 Months Ended			12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Retained Earnings [Member]
Dividends declared per share (in dollars per share)	$ 0.16	$ 0.15	$ 0.15	$ 0.16	$ 0.15	$ 0.15	$ 0.16	$ 0.15	$ 0.15	$ 0.17	$ 0.15	$ 0.15

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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- Details

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Namespace Prefix:
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