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Segment Information (Consolidated Total Assets by Segment) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Sep. 30, 2012
Assets $ 2,048,817 $ 1,859,964
Property, plant and equipment, net 265,497 234,505
Aerospace [Member]
   
Assets 1,253,214 1,059,754
Energy [Member]
   
Assets 577,191 605,842
Unallocated Corporate [Member]
   
Property, plant and equipment, net 28,926 15,763
Other unallocated assets 189,486 178,605
Total of Reporting Segments [Member]
   
Assets $ 1,830,405 $ 1,665,596