Business Acquisitions and Investments (Details) $ in Thousands		1 Months Ended		3 Months Ended		4 Months Ended	6 Months Ended		12 Months Ended
		May 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Mar. 31, 2018 CNY (¥)	Mar. 31, 2018 USD ($)	Apr. 30, 2014 USD ($)
Allocation of the Purchase Price, Assets Acquired and Liabilities Assumed [Abstract]
Net sales	[1]			$ 305,172	$ 286,636		$ 588,938	$ 548,462
Assets acquired and liabilities assumed [Abstract]
Goodwill				$ 77,728			$ 77,728		$ 67,321
Foshan GWO YNG SMP Vehicle Climate Control & Cooling Products Co. Ltd. [Member]
Business Combination, Description [Abstract]
Percentage of equity interest acquired in joint venture				65.00%			65.00%			15.00%	15.00%	50.00%
Investment in unconsolidated affiliates										¥ 26,475,583	$ 4,200	$ 14,000
Purchase price payment						$ 2,800
Pollak business of Stoneridge, Inc. [Member]
Allocation of the Purchase Price, Assets Acquired and Liabilities Assumed [Abstract]
Acquisition of assets and liabilities			$ 40,000
Post-closing adjustments amount		$ 1,600
Net sales									$ 45,000
Purchase Price			38,427
Assets acquired and liabilities assumed [Abstract]
Inventory			3,331
Property, plant and equipment, net			45
Intangible assets			24,650
Goodwill			10,401
Net assets acquired			38,427
Estimated useful life of intangible assets							15 years
Revenues				$ 10,700
Pollak business of Stoneridge, Inc. [Member] | Customer Relationships [Member]
Assets acquired and liabilities assumed [Abstract]
Intangible assets			7,200
Estimated useful life of intangible assets							15 years
Pollak business of Stoneridge, Inc. [Member] | Trademarks [Member]
Assets acquired and liabilities assumed [Abstract]
Intangible assets			200
Estimated useful life of intangible assets							10 years
Pollak business of Stoneridge, Inc. [Member] | Non-Compete Agreements [Member]
Assets acquired and liabilities assumed [Abstract]
Intangible assets			100
Estimated useful life of intangible assets							5 years
Pollak business of Stoneridge, Inc. [Member] | OE/OES [Member]
Assets acquired and liabilities assumed [Abstract]
Estimated useful life of intangible assets							10 years
Pollak business of Stoneridge, Inc. [Member] | OE/OES [Member] | Customer Relationships [Member]
Assets acquired and liabilities assumed [Abstract]
Intangible assets			$ 17,200
Estimated useful life of intangible assets							10 years

[1] Segment net sales include intersegment sales in our Engine Management and Temperature Control segments.