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Acquisitions - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2019
Superior QC
Business Acquisition [Line Items]
Business acquisition date	Feb. 20, 2018
Current Power Solutions Inc.
Business Acquisition [Line Items]
Business acquisition date	Oct. 25, 2018

X

- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 7
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Subparagraph (b)
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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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- Details

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- Details

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