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Segment Information (Narrative) (Details) $ in Thousands | Oct. 01, 2017 | Mar. 31, 2018 USD ($) | Sep. 30, 2017 USD ($)
--- | --- | --- | ---
Segment Reporting Information |  |  |
Number of Reportable Segments | 3 |  |
Segment Assets |  | $ 3,102,757 | $ 3,090,592
Space And Defense Controls |  |  |
Segment Reporting Information |  |  |
Segment Assets |  | 627,000 |
Industrial Systems |  |  |
Segment Reporting Information |  |  |
Segment Assets |  | $ 1,229,000 |

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