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Revenue Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | $ 224,910 | $ 213,370 | $ 442,010 | $ 413,200
Consumer [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 71,990 | 66,780 | 136,720 | 125,660
Aerospace [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 45,620 | 47,580 | 91,430 | 93,000
Industrial [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 55,970 | 50,000 | 110,320 | 99,290
Oil and gas [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | $ 51,330 | $ 49,010 | $ 103,540 | $ 95,250

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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