Other Liabilities (Schedule of Other Liabilities) (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Sep. 30, 2021
Other Liabilities Noncurrent [Abstract]
Net accrued retirement benefits, less amounts recognized within accrued liabilities		$ 106,815	$ 107,074
Total unrecognized tax benefits		11,392	13,412
Noncurrent income taxes payable		16,257	16,257
Deferred economic incentives	[1]	7,918	8,173
Cross-currency swap derivative liability		37,426	50,185
Operating lease liabilities		16,294	14,770
Net noncurrent contract liabilities		389,437	386,324
Other		10,766	21,713
Other liabilities		$ 596,305	$ 617,908

[1] Woodward receives certain economic incentives from various state and local authorities related to capital expansion projects.  Such amounts are initially recorded as deferred credits and are being recognized as a reduction to pre-tax expense over the economic lives of the related capital expansion projects.