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Segment Information (Consolidated Total Assets, Depreciation, Amortization and Capital Expenditures by Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
Assets | $ 2,539,965 | $ 2,397,202 | $ 2,218,518
Property, plant and equipment, net | 756,100 | 513,279 |
Depreciation and amortization | 75,235 | 77,353 | 74,233
Capital expenditures | 286,612 | 207,106 | 141,600
Aerospace [Member] |  |  |
Assets | 1,566,421 | 1,440,355 | 1,361,861
Depreciation and amortization | 46,488 | 46,895 | 49,887
Capital expenditures | 150,021 | 134,307 | 74,964
Energy [Member] |  |  |
Assets | 653,848 | 610,345 | 599,007
Depreciation and amortization | 20,768 | 22,672 | 20,890
Capital expenditures | 113,292 | 55,780 | 28,137
All Other Segments [Member] |  |  |
Assets | 233,862 | 273,510 | 207,535
Unallocated Corporate [Member] |  |  |
Assets | 85,834 | 72,992 | 50,115
Depreciation and amortization | 7,979 | 7,786 | 3,456
Capital expenditures | 23,299 | 17,019 | 38,499
Total of Reporting Segments [Member] |  |  |
Assets | 2,220,269 | 2,050,700 | 1,960,868
Depreciation and amortization | 67,256 | 69,567 | 70,777
Capital expenditures | $ 263,313 | $ 190,087 | $ 103,101

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