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Revenue (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2020
Noncurrent unbilled receivables | $ 12,053 |  | $ 16,751
Revenue from contract liabilities | $ 6,528 | $ 3,970 |
Net Sales [Member] | Manufactured Products [Member] |  |  |
Percentage of attributable to revenue | 87.00% | 87.00% |
Net Sales [Member] | MRO Products [Member] |  |  |
Percentage of attributable to revenue | 12.00% | 12.00% |
Net Sales [Member] | Service [Member] |  |  |
Percentage of attributable to revenue | 1.00% | 1.00% |

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