Retirement Benefits (Tables)

6 Months Ended

Mar. 31, 2020

Retirement Benefits [Line Items]

Schedule of Amount of Expense Associated with Defined Contribution Plans

	Three-Months Ended				Six-Months Ended
	March 31,				March 31,
	2020		2019		2020		2019
Company costs	$	8,910	$	9,086	$	17,614	$	17,457

Schedule of Estimated Remaining Cash Contributions

Retirement pension benefits:
United States	$	-
United Kingdom		199
Japan		-
Germany		481
Other postretirement benefits		2,716

Schedule of Amounts of Contributions Associated with Multiemployer Defined Benefit Plans

	Three-Months Ended				Six-Months Ended
	March 31,				March 31,
	2020		2019		2020		2019
Company contributions	$	128	$	61	$	198	$	138

Defined Benefit Pension Plan [Member]

Retirement Benefits [Line Items]

Schedule of Net Periodic Benefit Costs

	Three-Months Ended March 31,
	United States				Other Countries				Total
	2020		2019		2020		2019		2020		2019
Service cost	$	415	$	362	$	708	$	512	$	1,123	$	874
Interest cost		1,397		1,596		319		485		1,716		2,081
Expected return on plan assets		(3,086)		(2,997)		(708)		(672)		(3,794)		(3,669)
Amortization of:
Net actuarial loss		357		155		260		73		617		228
Prior service cost		234		178		6		-		240		178
Net periodic retirement pension (benefit) cost	$	(683)	$	(706)	$	585	$	398	$	(98)	$	(308)
Contributions paid	$	-	$	-	$	601	$	509	$	601	$	509
	Six-Months Ended March 31,
	United States				Other Countries				Total
	2020		2019		2020		2019		2020		2019
Service cost	$	830	$	725	$	1,418	$	1,024	$	2,248	$	1,749
Interest cost		2,795		3,192		640		965		3,435		4,157
Expected return on plan assets		(6,173)		(5,993)		(1,540)		(1,334)		(7,713)		(7,327)
Amortization of:
Net actuarial loss		715		309		521		144		1,236		453
Prior service cost		468		355		12		-		480		355
Net periodic retirement pension (benefit) cost	$	(1,365)	$	(1,412)	$	1,051	$	799	$	(314)	$	(613)
Contributions paid	$	-	$	-	$	1,732	$	1,063	$	1,732	$	1,063

Other Postretirement Benefit Plans [Member]

Retirement Benefits [Line Items]

Schedule of Net Periodic Benefit Costs

	Three-Months Ended				Six-Months Ended
	March 31,				March 31,
	2020		2019		2020		2019
Service cost	$	-	$	2	$	1	$	3
Interest cost		196		289		391		577
Amortization of:
Net actuarial loss		11		14		23		28
Prior service cost (benefit)		-		(2)		1		(3)
Net periodic other postretirement cost	$	207	$	303	$	416	$	605
Contributions paid	$	176	$	704	$	521	$	1,077