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Revenue (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Sep. 30, 2019
Billed accounts receivable due within | 60 days |  | 60 days |  |
Noncurrent unbilled receivables | $ 28,278 |  | $ 28,278 |  | $ 1,573
Revenue from contract liabilities | $ 8,356 | $ 6,147 | $ 28,288 | $ 26,459 |
Net Sales [Member] | Manufactured Products [Member] |  |  |  |  |
Percentage of attributable to revenue | 86.00% | 84.00% | 86.00% | 86.00% |
Net Sales [Member] | MRO Products [Member] |  |  |  |  |
Percentage of attributable to revenue | 12.00% | 13.00% | 12.00% | 12.00% |

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