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Segment Information (Consolidated Total Assets, Depreciation and Amortization, and Capital Expenditures by Segment) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Assets | $ 2,397,202 | $ 2,218,518 | $ 1,859,964
Property, plant and equipment, net | 513,279 | 350,048 |
Other unallocated assets | 273,510 | 207,535 | 178,605
Depreciation and amortization | 77,353 | 74,233 | 68,617
Capital expenditures | 207,106 | 141,600 | 64,900
Aerospace [Member] |  |  |
Assets | 1,440,355 | 1,361,861 | 1,059,754
Depreciation and amortization | 46,895 | 49,887 | 43,840
Capital expenditures | 134,307 | 74,964 | 32,244
Energy [Member] |  |  |
Assets | 610,345 | 599,007 | 605,842
Depreciation and amortization | 22,672 | 20,890 | 21,738
Capital expenditures | 55,780 | 28,137 | 22,590
Unallocated Corporate [Member] |  |  |
Assets | 72,992 | 50,115 | 15,763
Depreciation and amortization | 7,786 | 3,456 | 3,039
Capital expenditures | 17,019 | 38,499 | 10,066
Total of Reporting Segments [Member] |  |  |
Assets | 2,050,700 | 1,960,868 | 1,665,596
Depreciation and amortization | 69,567 | 70,777 | 65,578
Capital expenditures | $ 190,087 | $ 103,101 | $ 54,834

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