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Segment Information (Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
Net sales | $ 562,625 | $ 494,810 | $ 493,222 | $ 487,646 | $ 565,447 | $ 524,284 | $ 482,467 | $ 429,042 | $ 2,038,303 | $ 2,001,240 | $ 1,935,976
Interest expense, net | (7,289) | (5,858) | (5,108) | (5,822) | (4,503) | (5,899) | (6,128) | (6,003) | (24,077) | (22,533) | (26,430)
Consolidated earnings before income taxes | 68,727 | 57,559 | 57,591 | 57,072 | 75,076 | 62,468 | 56,756 | 32,944 | 240,949 | 227,244 | 199,571
Total of Reporting Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 2,038,303 | 2,001,240 | 1,935,976
Segment earnings (loss) | 89,494 | 76,981 | 72,852 | 75,061 | 92,121 | 79,560 | 72,177 | 49,620 | 314,388 | 293,478 | 265,062
Aerospace [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales | 335,207 | 288,480 | 281,426 | 255,770 | 318,209 | 274,923 | 261,021 | 229,872 | 1,160,883 | 1,084,025 | 1,061,477
Segment earnings (loss) | 59,964 | 46,362 | 45,628 | 35,793 | 57,005 | 39,357 | 40,289 | 22,549 | 187,747 | 159,200 | 166,122
Energy [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales | 227,418 | 206,330 | 211,796 | 231,876 | 247,238 | 249,361 | 221,446 | 199,170 | 877,420 | 917,215 | 874,499
Segment earnings (loss) | 29,530 | 30,619 | 27,224 | 39,268 | 35,116 | 40,203 | 31,888 | 27,071 | 126,641 | 134,278 | 98,940
Unallocated Corporate [Member] |  |  |  |  |  |  |  |  |  |  |
Segment earnings (loss) | $ (13,478) | $ (13,564) | $ (10,153) | $ (12,167) | $ (12,542) | $ (11,193) | $ (9,293) | $ (10,673) | $ (49,362) | $ (43,701) | $ (39,061)

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