Accrued Liabilities (Changes in Restructuring Reserve Activity) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Charges	$ 19,040		$ 19,040
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period		$ 3,395	507
Charges			19,040
Payments		2,409	14,559
Foreign currency exchange rate changes		180	(10)
Non-cash activity		(1,166)
Restructuring charges, end of period	4,978		4,978
Employee Severance [Member] \| Duarte Relocation Restructuring Charge Reserve
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period			440
Payments			440
Employee Severance [Member] \| Industrial Turbomachinery Business Realignment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period			67
Payments			67
Employee Severance [Member] \| Covid-19 Pandemic [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period		3,395
Charges			19,040
Payments		2,409	14,052
Foreign currency exchange rate changes		180	(10)
Non-cash activity		$ (1,166)
Restructuring charges, end of period	$ 4,978		$ 4,978

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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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to 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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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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