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Supplemental Quarterly Financial Data (Unaudited) (Quarterly Financial Information - Segment Reporting) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Net sales | $ 565,447 | $ 524,284 | $ 482,467 | $ 429,042 | $ 558,365 | $ 483,759 | $ 485,513 | $ 408,339 | $ 2,001,240 | $ 1,935,976 | $ 1,865,627
Segment earnings (loss) |  |  |  |  |  |  |  |  | 293,478 | 265,062 | 256,633
Interest expense, net | (4,503) | (5,899) | (6,128) | (6,003) | (6,439) | (6,655) | (6,948) | (6,388) | (22,533) | (26,430) | (25,461)
Consolidated earnings before income taxes | 75,076 | 62,468 | 56,756 | 32,944 | 75,201 | 35,497 | 50,336 | 38,537 | 227,244 | 199,571 | 197,807
Total of Reporting Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales | 565,447 | 524,284 | 482,467 | 429,042 | 558,365 | 483,759 | 485,513 | 408,339 |  |  |
Segment earnings (loss) | 92,121 | 79,560 | 72,177 | 49,620 | 92,749 | 51,379 | 65,458 | 55,476 |  |  |
Aerospace [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales | 318,209 | 274,923 | 261,021 | 229,872 | 307,377 | 272,218 | 270,493 | 211,389 | 1,084,025 | 1,061,477 | 896,083
Segment earnings (loss) | 57,005 | 39,357 | 40,289 | 22,549 | 54,382 | 38,949 | 41,223 | 31,568 | 159,200 | 166,122 | 130,192
Energy [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales | 247,238 | 249,361 | 221,446 | 199,170 | 250,988 | 211,541 | 215,020 | 196,950 | 917,215 | 874,499 | 969,544
Segment earnings (loss) | 35,116 | 40,203 | 31,888 | 27,071 | 38,367 | 12,430 | 24,235 | 23,908 | 134,278 | 98,940 | 126,441
Unallocated Corporate [Member] |  |  |  |  |  |  |  |  |  |  |
Segment earnings (loss) | $ (12,542) | $ (11,193) | $ (9,293) | $ (10,673) | $ (11,109) | $ (9,227) | $ (8,174) | $ (10,551) | $ (43,701) | $ (39,061) | $ (33,365)

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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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