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Income Taxes (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2013
Income Taxes    
Deferred Tax Assets, Operating Loss Carryforwards, Foreign $ 2,972 $ 7,058
Undistributed foreign earnings for which Woodward has not provided for taxes   207,224
Tax benefit related to reduction in the amount of undistributed earnings expected to be repatriated to the US in the foreseeable future 3,326  
Estimated decrease in liability for unrecognized tax benefits   565
Unrecognized tax benefits that, if recognized, would affect the effective tax rate 13,713 17,838
Accrued interest and penalties $ 1,701 $ 2,066