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Segment Information - Additional Information (Details) - item | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Number of reporting segments | 2 |  |
Net sales | Customer concentration | Airbus and its subcontractors |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration percentage (as a percent) | 41.00% | 44.00% | 41.00%
Net sales | Customer concentration | Airbus and its subcontractors | Commercial Aerospace Market Applications |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration percentage (as a percent) | 38.00% |  |
Net sales | Customer concentration | Airbus and its subcontractors | Space & Defense Market Applications |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration percentage (as a percent) | 3.00% |  |
Net sales | Customer concentration | Airbus and its subcontractors | Composite Materials |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration percentage (as a percent) | 46.00% | 50.00% | 48.00%
Net sales | Customer concentration | Boeing company and its subcontractors |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration percentage (as a percent) | 25.00% | 25.00% | 28.00%
Net sales | Customer concentration | Boeing company and its subcontractors | Commercial Aerospace Market Applications |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration percentage (as a percent) | 23.00% |  |
Net sales | Customer concentration | Boeing company and its subcontractors | Space & Defense Market Applications |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration percentage (as a percent) | 2.00% |  |
Net sales | Customer concentration | Boeing company and its subcontractors | Composite Materials |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration percentage (as a percent) | 16.00% | 16.00% | 17.00%
Net sales | Customer concentration | Boeing company and its subcontractors | Engineered Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration percentage (as a percent) | 63.00% | 64.00% | 69.00%

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