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Segment Information (Consolidated Total Assets by Segment) (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Sep. 30, 2016
--- | --- | ---
Assets | $ 2,679,323 | $ 2,642,362
Other unallocated assets | 218,889 | 209,683
Property, plant and equipment, net | 903,394 | 876,350
Aerospace [Member] |  |
Assets | 1,699,831 | 1,637,522
Industrial [Member] |  |
Assets | 662,650 | 705,169
Unallocated Corporate [Member] |  |
Property, plant and equipment, net | $ 97,953 | $ 89,988

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