Financial Instruments and Fair Value Measurements (Narrative) (Details) (USD $) In Thousands			3 Months Ended
Jun. 30, 2011	Sep. 30, 2010	Dec. 31, 2010 Derivatives in Foreign Currency Relationships [Member]
Financial liability on recurring basis	$ 0	$ 0
Realized loss on settlement of forward contract			$ 1,033

Name:

wwd_RealizedGainLossOnSettlementOfDerivativeInstrument

Namespace Prefix:

wwd

Data Type:

xbrli:monetaryItemType

Balance Type:

credit

Period Type:

duration