Leases (Lease-Related Expenses) (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating lease expense		$ 6,559	$ 6,164
Amortization of financing lease assets		425	476
Interest on financing lease liabilities		58	87
Variable lease expense		1,495	1,101
Short-term lease expense		283	466
Sublease income	[1]	(680)	(697)
Total lease expense		$ 8,140	$ 7,597

[1] Relates to two separate subleases Woodward has entered into for a leased manufacturing building in Niles, Illinois.