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Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |
Net sales | $ 199,830 | $ 202,880
Operating profit (loss) | 15,740 | 16,450
Packaging [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 80,960 | 80,110
Operating profit (loss) | 16,850 | 17,840
Aerospace [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 45,420 | 40,500
Operating profit (loss) | 5,000 | 3,460
Energy [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 40,930 | 44,750
Operating profit (loss) | (3,900) | (3,610)
Engineered Components [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 32,520 | 37,520
Operating profit (loss) | 4,980 | 5,580
Corporate, Non-Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Operating profit (loss) | $ (7,190) | $ (6,820)

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