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Segment Information (Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Net sales | $ 442,894 | $ 445,110
Interest expense, net | (6,435) | (6,461)
Consolidated earnings before income taxes | 47,059 | 27,956
Aerospace [Member] |  |
Net sales | 266,680 | 268,599
Segment earnings (loss) | 46,877 | 43,486
Industrial [Member] |  |
Net sales | 176,214 | 176,511
Segment earnings (loss) | 17,998 | 21,551
Total of Reporting Segments [Member] |  |
Segment earnings (loss) | 64,875 | 65,037
Unallocated Corporate [Member] |  |
Segment earnings (loss) | $ (11,381) | $ (30,620)

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