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Accrued Liabilities (Changes in Restructuring Reserve Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost And Reserve [Line Items]
Charges	$ 22,216		$ 17,013
Employee Severance [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges, beginning of period	507	$ 16,522
Charges	23,673
Payments	18,572	12,445
Foreign currency exchange rate changes	77
Non-cash activity	(2,290)	(3,570)
Restructuring charges, end of period	3,395	507	16,522
Employee Severance [Member] | Covid-19 Pandemic [Member]
Restructuring Cost And Reserve [Line Items]
Charges	23,673
Payments	18,065
Foreign currency exchange rate changes	77
Non-cash activity	(2,290)
Restructuring charges, end of period	3,395
Employee Severance [Member] | Duarte Relocation Restructuring Charge Reserve
Restructuring Cost And Reserve [Line Items]
Restructuring charges, beginning of period	440	12,504
Payments	440	8,685
Non-cash activity		(3,379)
Restructuring charges, end of period		440	12,504
Employee Severance [Member] | Industrial Turbomachinery Business Realignment [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges, beginning of period	67	4,018
Payments	$ 67	3,760
Non-cash activity		(191)
Restructuring charges, end of period		$ 67	$ 4,018

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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