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Acquisitions - Summary of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Powertrain
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount	$ 13,600
Estimated life	11 years 6 months
Powertrain | Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount	$ 600
Estimated life	3 months
Powertrain | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount	$ 13,000
Estimated life	12 years
Bi-Phase
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount	$ 860
Estimated life	8 years 6 months
Bi-Phase | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount	$ 700
Estimated life	7 years
Bi-Phase | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount	$ 160
Estimated life	15 years
Buck's | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount	$ 1,380
Estimated life	10 years
3PI
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount		$ 23,300
Estimated life	12 years 5 months 8 days
3PI | Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount		$ 1,200
Estimated life		15 months
3PI | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount		$ 20,400
Estimated life		13 years
3PI | Tradenames and trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Amount		$ 1,700
Estimated life		13 years

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- Definition

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+ References

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
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