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Revenue (Narrative - Performance Obligations) (Details1) - USD ($) $ in Thousands | Jun. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Remaining performance obligation amount | $ 2,120,096 | $ 1,558,588
Material Rights [Member] |  |
Remaining performance obligation amount | $ 481,417 | $ 448,370
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-07-01 |  |
Period of remaining performance obligation, expected timing of satisfaction | 6 months |
Remaining performance obligation amount | $ 4,594 |
Remaining performance obligation, expected timing of satisfaction, year | 2023 |
Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-10-01 |  |
Period of remaining performance obligation, expected timing of satisfaction | 1 year |
Remaining performance obligation amount | $ 15,510 |
Remaining performance obligation, expected timing of satisfaction, year | 2024 |
Aerospace [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-07-01 |  |
Period of remaining performance obligation, expected timing of satisfaction | 2 years |
Maximum [Member] | Material Rights [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-10-01 |  |
Period of remaining performance obligation, expected timing of satisfaction | 40 years |

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