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

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