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Derivative Instruments and Hedging Activities (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
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Dec. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2014
Net unrecognized losses on terminated derivative instruments expected to be reclassified to earnings | $ 103 us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred |  |
Term of gain or loss recognition in interest expense on terminated derivatives recorded in OCI | 12 months |  |
Interest Expense [Member] | Derivatives in Cash Flow Hedging Relationships [Member] |  |  |
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative | 0 us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember | 0 us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember |
Total Accumulated Other Comprehensive (Loss) Earnings [Member] |  |  |
Unrecognized gains (loss) | $ 195 wwd_RealizedGainLossOnTerminatedDerivatives / us-gaap_BalanceSheetLocationAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | $ 170 wwd_RealizedGainLossOnTerminatedDerivatives / us-gaap_BalanceSheetLocationAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember

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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References No definition available. + Details
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- Definition Estimated period for the anticipated transfer of gain (loss), net, from accumulated other comprehensive income into earnings, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition The remaining amount of the realized gain or loss upon termination or settlement of derivative instruments which are held on the balance sheet and are being amortized into expense over the life of the associated hedged item. + References No definition available. + Details
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