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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6508534

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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-URI http://asc.fasb.org/extlink&oid=6513228

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Net Income Per Common Share Net Loss per Common Share (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		6 Months Ended
	Apr. 13, 2016	Mar. 29, 2016	Mar. 09, 2016	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Anti-dilutive securities (in shares)				19,000	8,000	10,000	4,000
Cash dividends declared per share				$ 0.6225	$ 0.4150	$ 1.2450	$ 0.8300
Payments of Dividends				$ 22,600	$ 15,100	$ 45,221	$ 30,141
Scenario, Forecast [Member]
Cash dividends declared per share			$ 0.8100
Dividends Payable, Date to be Paid	Apr. 13, 2016
Dividends Payable, Date of Record		Mar. 29, 2016