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Business Acquisitions (Schedule of Results of Operations of Acquired Entity Since Acquisition Date) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013
Business Acquisition, Acquiree - Duarte Business [Member] |  |
Net sales | $ 145,998 | $ 111,261

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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=wwd_BusinessAcquisitionAcquireeDuarteBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |