Goodwill - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended
Dec. 31, 2018	Sep. 30, 2019
Goodwill [Line Items]
Goodwill	$ 439,452,000	$ 437,280,000
Mobile Solutions
Goodwill [Line Items]
Goodwill		0
Power Solutions
Goodwill [Line Items]
Goodwill, impairment loss	109,100,000	0
Goodwill	$ 94,505,000	$ 94,303,000

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266

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Data Type:	xbrli:monetaryItemType
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