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Segment Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Net Sales | $ 817,740 | $ 794,020 | $ 863,980
Operating Profit (Loss) | 88,490 | (44,000) | (4,250)
Capital Expenditures | 36,800 | 31,330 | 28,660
Depreciation and Amortization | 46,870 | 44,860 | 43,540
Assets | 1,033,200 | 1,051,650 | 1,170,300
Packaging [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales | 344,570 | 341,340 | 334,270
Operating Profit (Loss) | 80,380 | 77,840 | 78,470
Capital Expenditures | 17,140 | 19,880 | 13,670
Depreciation and Amortization | 21,630 | 22,120 | 20,920
Assets | 431,680 | 423,460 | 418,810
Aerospace [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales | 184,310 | 174,920 | 176,480
Operating Profit (Loss) | 26,190 | (90,810) | 28,320
Capital Expenditures | 3,370 | 3,950 | 5,010
Depreciation and Amortization | 14,530 | 14,090 | 13,290
Assets | 401,060 | 409,040 | 517,820
Energy [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales | 161,580 | 158,990 | 193,390
Operating Profit (Loss) | (5,410) | (13,840) | (97,160)
Capital Expenditures | 3,090 | 2,800 | 7,610
Depreciation and Amortization | 6,550 | 4,280 | 4,790
Assets | 96,320 | 100,590 | 128,170
Engineered Components [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales | 127,280 | 118,770 | 159,840
Operating Profit (Loss) | 15,740 | 15,300 | 18,240
Capital Expenditures | 3,740 | 4,670 | 2,320
Depreciation and Amortization | 3,980 | 4,090 | 4,200
Assets | 76,520 | 78,570 | 88,320
Corporate [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating Profit (Loss) | (28,410) | (32,490) | (32,120)
Capital Expenditures | 9,460 | 30 | 50
Depreciation and Amortization | 180 | 280 | 340
Assets | $ 27,620 | $ 39,990 | $ 17,180

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