Accrued Liabilities (Changes in Restructuring Reserve Activity) (Details) - Employee Severance [Member] - USD ($) $ in Thousands	6 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period	$ 507	$ 16,522
Charges (reductions)
Cash receipts (payments)	(464)	(2,897)
Non-cash activity	(43)
Restructuring charges, end of period		13,625
Duarte Relocation Restructuring Charge Reserve
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period	440	12,504
Charges (reductions)
Cash receipts (payments)	(440)	(648)
Non-cash activity
Restructuring charges, end of period		11,856
Industrial Turbomachinery Business Realignment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, beginning of period	67	4,018
Charges (reductions)
Cash receipts (payments)	(24)	(2,249)
Non-cash activity	$ (43)
Restructuring charges, end of period		$ 1,769

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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