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Derivative Instruments and Hedging Activities (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2014
Sep. 30, 2014
Net unrecognized losses on terminated derivative instruments expected to be reclassified to earnings $ 107us-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 0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_InterestExpenseMember
0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_InterestExpenseMember
0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_InterestExpenseMember
0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_InterestExpenseMember
 
Total Accumulated Other Comprehensive (Loss) Earnings [Member]          
Unrecognized gains (loss) $ 219wwd_RealizedGainLossOnTerminatedDerivatives
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
$ 219wwd_RealizedGainLossOnTerminatedDerivatives
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
    $ 170wwd_RealizedGainLossOnTerminatedDerivatives
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember