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Segment Information (Consolidated Total Assets by Segment) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2012 | Sep. 30, 2011
--- | --- | ---
Assets | $ 1,816,340 | $ 1,781,434
Property, plant and equipment, net | 214,497 | 206,725
Aerospace [Member] |  |
Assets | 1,035,470 | 1,036,797
Energy [Member] |  |
Assets | 604,689 | 569,929
Total Segment Assets [Member] |  |
Assets | 1,640,159 | 1,606,726
Unallocated Corporate [Member] |  |
Property, plant and equipment, net | 12,137 | 8,556
Other unallocated assets | $ 164,044 | $ 166,152

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