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Segment Reporting - Segment Information About Reported Segment Product Revenues by Product Category (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Product revenues		$ 1,456,124	$ 1,469,076	$ 1,204,656
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues		1,406,278	1,422,952	1,161,616
Automotive Segments | Climate Control Seat
Segment Reporting Information [Line Items]
Product revenues		468,820	482,665	426,046
Automotive Segments | Seat Heaters
Segment Reporting Information [Line Items]
Product revenues		297,866	308,588	283,970
Automotive Segments | Steering Wheel Heaters
Segment Reporting Information [Line Items]
Product revenues		169,763	153,943	120,949
Automotive Segments | Lumbar and Massage Comfort Solutions
Segment Reporting Information [Line Items]
Product revenues	[1]	178,584	144,923	56,980
Automotive Segments | Valve Systems
Segment Reporting Information [Line Items]
Product revenues	[1]	105,056	106,262	41,980
Automotive Segments | Automotive Cables
Segment Reporting Information [Line Items]
Product revenues		73,091	79,993	76,962
Automotive Segments | Battery Performance Solutions
Segment Reporting Information [Line Items]
Product revenues		58,183	75,484	71,907
Automotive Segments | Electronics
Segment Reporting Information [Line Items]
Product revenues		33,065	40,387	44,106
Automotive Segments | Other Automotive
Segment Reporting Information [Line Items]
Product revenues		21,850	30,707	38,716
Industrial Segments | Medical
Segment Reporting Information [Line Items]
Product revenues	[1]	$ 49,846	$ 46,124	$ 43,040
[1] Includes product revenues from acquisitions since their respective acquisition dates (see Note 4).

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