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Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2021
Disaggregation of Revenue [Line Items] |  |  |
Contract assets | $ 15,701 |  | $ 23,998
Contract liabilities | $ 21,138 |  | $ 19,752
Revenue Benchmark | Product Concentration Risk | Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Concentration risk, percentage | 13.00% | 7.00% |

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