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Contingencies - Warranty (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |  |  |  |
Standard product warranty length, minimum |  |  | 1 year |
Standard product warranty length, maximum |  |  | 2 years |
Limited product warranty length (up to) |  |  | 10 years |
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |  |
Balance at beginning of period | $ 12,616 | $ 12,646 | $ 13,052 | $ 13,388
Accruals for warranties issued | 2,783 | 2,707 | 5,037 | 4,372
Changes in liability related to warranties existing in prior periods | (57) | (1,151) | 320 | (1,084)
Payments made | (2,921) | (2,144) | (5,988) | (4,618)
Balance at end of period | $ 12,421 | $ 12,058 | $ 12,421 | $ 12,058

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- Definition Limited Product Warranty Length + References No definition available. + Details
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- Definition Standard Product Warranty Length, Maximum + References No definition available. + Details
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- Definition Standard Product Warranty Length, Minimum + References No definition available. + Details
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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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- Definition Amount of decrease in the standard product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard product warranty. Excludes extended product warranties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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- Definition Amount of increase in the standard product warranty accrual from warranties issued. Excludes extended product warranties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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