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Revenue Revenue (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue [Table Text Block] | The following table presents the Company’s disaggregated net sales by primary end market served (dollars in thousands):
|  | Three months ended June 30, |  | Six months ended June 30,
Customer End Markets |  | 2018 |  | 2017 |  | 2018 |  | 2017
Consumer |  | $ | 71,990 |  |  | $ | 66,780 |  |  | $ | 136,720 |  |  | $ | 125,660 |
Aerospace |  | 45,620 |  |  | 47,580 |  |  | 91,430 |  |  | 93,000 |
Industrial |  | 55,970 |  |  | 50,000 |  |  | 110,320 |  |  | 99,290 |
Oil and gas |  | 51,330 |  |  | 49,010 |  |  | 103,540 |  |  | 95,250 |
Total net sales |  | $ | 224,910 |  |  | $ | 213,370 |  |  | $ | 442,010 |  |  | $ | 413,200 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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