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Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 224,900 | $ 224,710 | $ 449,030 | $ 441,540
Operating profit (loss) | 19,210 | 25,370 | 42,230 | 49,480
Packaging [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 89,580 | 86,250 | 168,540 | 167,680
Operating profit (loss) | 20,710 | 20,540 | 38,220 | 38,900
Energy [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 50,150 | 52,320 | 101,310 | 105,100
Operating profit (loss) | (7,170) | (630) | (6,830) | 1,970
Aerospace [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 43,220 | 31,820 | 88,960 | 59,010
Operating profit (loss) | 7,220 | 5,660 | 15,300 | 10,520
Engineered Components [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 41,950 | 54,320 | 90,220 | 109,750
Operating profit (loss) | 6,220 | 8,950 | 12,190 | 16,830
Corporate, Non-Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating profit (loss) | $ (7,770) | $ (9,150) | $ (16,650) | $ (18,740)

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