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Segment Information (Consolidated Net Sales and Earnings by Segment) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 | Mar. 31, 2013
Net sales | $ 482,467 | $ 485,513 | $ 911,509 | $ 893,852
Interest expense, net | (6,128) | (6,948) | (12,131) | (13,336)
Consolidated earnings before income taxes | 56,756 | 50,336 | 89,700 | 88,873
Total of Reporting Segments [Member] |  |  |  |
Segment earnings (loss) | 72,177 | 65,458 | 121,797 | 120,934
Aerospace [Member] |  |  |  |
Net sales | 261,021 | 270,493 | 490,893 | 481,882
Segment earnings (loss) | 40,289 | 41,223 | 62,838 | 72,791
Energy [Member] |  |  |  |
Net sales | 221,446 | 215,020 | 420,616 | 411,970
Segment earnings (loss) | 31,888 | 24,235 | 58,959 | 48,143
Unallocated Corporate [Member] |  |  |  |
Segment earnings (loss) | $ (9,293) | $ (8,174) | $ (19,966) | $ (18,725)

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