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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%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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