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Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 209,330 | $ 202,290 | $ 622,530 | $ 608,490
Operating profit (loss) | 28,120 | 17,790 | 70,110 | 52,900
Packaging [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 89,560 | 90,330 | 259,260 | 258,550
Operating profit (loss) | 23,090 | 20,090 | 61,480 | 59,340
Aerospace [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 48,550 | 47,430 | 141,550 | 132,020
Operating profit (loss) | 7,760 | 6,660 | 19,690 | 13,670
Energy [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 40,440 | 38,230 | 124,860 | 122,930
Operating profit (loss) | 1,240 | (1,870) | (2,550) | (8,570)
Engineered Components [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 30,780 | 26,300 | 96,860 | 94,990
Operating profit (loss) | 3,310 | 3,180 | 13,000 | 12,620
Corporate, Non-Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating profit (loss) | $ (7,280) | $ (10,270) | $ (21,510) | $ (24,160)

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