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Acquisitions - Estimated Useful Lives of Identifiable Intangible Assets (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Powertrain Integration, LLC [Member]
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets	$ 13,600
Powertrain Integration, LLC [Member] | Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets	$ 600
Finite lived intangible asset estimated life	3 months
Powertrain Integration, LLC [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets	$ 13,000
Finite lived intangible asset estimated life	12 years
Bi-Phase Technologies, LLC [Member]
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets	$ 860
Bi-Phase Technologies, LLC [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets	$ 160
Finite lived intangible asset estimated life	15 years
Bi-Phase Technologies, LLC [Member] | Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets	$ 700
Finite lived intangible asset estimated life	7 years
Buck's Acquisition Company, LLC [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets	$ 1,380
Finite lived intangible asset estimated life	10 years

X

- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 805



-SubTopic 10



-Section 55



-Paragraph 37



-URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 805



-SubTopic 20



-Section 50



-Paragraph 1



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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+ References

No definition available.

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