General (Details) (USD $)	1 Months Ended	3 Months Ended
Jan. 31, 2013	Jan. 31, 2014	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Insurance proceeds	$ 19,100,000	$ 0		$ 14,084,000
Proceeds from Insurance Settlement, Operating Activities			$ 11,200,000	$ 2,900,000	$ 5,000,000

The cash inflow from the amounts received by the insured under the terms of an insurance contract settlement. This element pertains only to insurance proceeds related to operating activities. It excludes insurance settlements classified as investing cash flows, for example, insurance settlements related to fixed assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 16

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3337-108585

Name:	us-gaap_ProceedsFromInsuranceSettlementOperatingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration