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Segment Reporting - Summary of Percentage of Revenues from Major Customers (Detail) - Net sales	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Ford
Revenue, Major Customer [Line Items]
Percentage of revenues from major customers	22.50%	20.60%	21.90%
General Motors
Revenue, Major Customer [Line Items]
Percentage of revenues from major customers	20.00%	22.00%	21.90%
BMW
Revenue, Major Customer [Line Items]
Percentage of revenues from major customers	10.50%	11.10%	10.00%

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- 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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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