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Segment Information (Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016
Net sales | $ 500,381 | $ 479,382 | $ 943,275 | $ 924,492
Interest expense, net | (6,316) | (5,793) | (12,751) | (12,254)
Consolidated earnings before income taxes | 50,236 | 54,366 | 97,295 | 82,322
Aerospace [Member] |  |  |  |
Net sales | 320,526 | 290,690 | 587,206 | 559,289
Segment earnings (loss) | 58,227 | 50,578 | 105,104 | 94,064
Industrial [Member] |  |  |  |
Net sales | 179,855 | 188,692 | 356,069 | 365,203
Segment earnings (loss) | 17,089 | 19,469 | 35,087 | 41,020
Unallocated Corporate [Member] |  |  |  |
Segment earnings (loss) | $ (18,764) | $ (9,888) | $ (30,145) | $ (40,508)

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