Retirement Benefits (Tables)

9 Months Ended

Jun. 30, 2021

Defined Benefit Plan Disclosure [Line Items]

Schedule of Amount of Expense Associated with Defined Contribution Plans

The amount of expense associated with defined contribution plans was as follows:

	Three-Months Ended				Nine-Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Company costs	$	8,647	$	8,005	$	25,180	$	25,619

Schedule of Estimated Remaining Cash Contributions

Woodward estimates its remaining cash contributions in fiscal year 2021 will be as follows:

Retirement pension benefits:
United States	$	—
United Kingdom		3
Japan		—
Germany		217
Other postretirement benefits		1,503

Defined Benefit Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Periodic Benefit Costs

The components of the net periodic retirement pension costs recognized are as follows:

	Three-Months Ended June 30,
	United States						Other Countries						Total
	2021			2020			2021			2020			2021			2020
Service cost	$	433		$	414		$	737		$	706		$	1,170		$	1,120
Interest cost		1,240			1,398			345			313			1,585			1,711
Expected return on plan assets		(3,536	)		(3,087	)		(632	)		(690	)		(4,168	)		(3,777	)
Amortization of:
Net actuarial loss		136			358			237			257			373			615
Prior service cost		242			234			6			5			248			239
Net periodic retirement pension (benefit) cost	$	(1,485	)	$	(683	)	$	693		$	591		$	(792	)	$	(92	)
Contributions paid	$	—		$	—		$	490		$	335		$	490		$	335
	Nine-Months Ended June 30,
	United States						Other Countries						Total
	2021			2020			2021			2020			2021			2020
Service cost	$	1,297		$	1,244		$	2,202		$	2,124		$	3,499		$	3,368
Interest cost		3,718			4,193			1,021			953			4,739			5,146
Expected return on plan assets		(10,608	)		(9,260	)		(1,859	)		(2,230	)		(12,467	)		(11,490	)
Amortization of:
Net actuarial loss		406			1,073			699			778			1,105			1,851
Prior service cost		727			702			18			17			745			719
Net periodic retirement pension (benefit) cost	$	(4,460	)	$	(2,048	)	$	2,081		$	1,642		$	(2,379	)	$	(406	)
Contributions paid	$	—		$	—		$	1,708		$	2,067		$	1,708		$	2,067

Other Postretirement Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Periodic Benefit Costs

The components of the net periodic other postretirement benefit costs recognized are as follows:

	Three-Months Ended				Nine-Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Service cost	$	—	$	1	$	1	$	2
Interest cost		150		195		449		586
Amortization of:
Net actuarial loss		7		12		22		35
Prior service cost		—		1		1		2
Net periodic other postretirement cost	$	157	$	209	$	473	$	625
Contributions paid	$	632	$	851	$	1,610	$	1,372