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Segment Information (Consolidated Total Assets by Segment) (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Sep. 30, 2014
--- | --- | ---
Assets | $ 2,511,736 | $ 2,397,202
Property, plant and equipment, net | 688,336 | 513,279
Aerospace [Member] |  |
Assets | 1,529,882 | 1,440,355
Energy [Member] |  |
Assets | 628,995 | 610,345
Unallocated Corporate [Member] |  |
Assets | 274,430 | 273,510
Property, plant and equipment, net | 78,429 | 72,992
Total of Reporting Segments [Member] |  |
Assets | $ 2,158,877 | $ 2,050,700

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