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Accrued Liabilities (Changes in Accrued Product Warranties) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Accrued Liabilities Current [Abstract]
Warranties, beginning of period	$ 27,309	$ 20,130	$ 13,597
Increases due to acquisition of L'Orange			6,045
Impact from adoption of ASC 606		705
Expense, net of recoveries	8,687	14,559	5,158
Reductions for settling warranties	(17,422)	(7,540)	(4,413)
Foreign currency exchange rate changes	398	(545)	(257)
Warranties, end of period	$ 18,972	$ 27,309	$ 20,130

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
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Amount of increase in the standard and extended product warranty accrual from a business acquisition.

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Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

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Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to preexisting product warranties.

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Amount of foreign currency translation gain (loss) which decreases (increases) the standard and extended product warranty accrual.

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Product Warranty Expense Recoveries

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