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Accounts Receivable (Schedule of Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Accounts receivable	$ 300,161us-gaap_AccountsAndOtherReceivablesNetCurrent	$ 346,858us-gaap_AccountsAndOtherReceivablesNetCurrent
Allowance for uncollectible customer amounts	(6,757)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent	(7,078)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Trade Accounts Receivable [Member]
Accounts Receivable, Gross	248,436us-gaap_AccountsReceivableGrossCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_TradeAccountsReceivableMember	291,584us-gaap_AccountsReceivableGrossCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_TradeAccountsReceivableMember
Accounts Receivable from Chinese Financial Institution [Member]
Accounts Receivable, Gross	$ 58,482us-gaap_AccountsReceivableGrossCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = wwd_AccountsReceivableFromChineseFinancialInstitutionMember	$ 62,352us-gaap_AccountsReceivableGrossCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = wwd_AccountsReceivableFromChineseFinancialInstitutionMember

X

- Definition

Amount due from customers, clients, or other third-parties, or arising from transactions not separately disclosed, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

+ References

No definition available.

+ Details

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X

- Definition

Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 3

-Subparagraph a, b

-Article 5

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X

- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.4)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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