Segment Reporting - Segment Information About Reported Segment Product Revenues by Product Category (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Product revenues		$ 1,469,076	$ 1,204,656	$ 1,046,150
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues		1,422,952	1,161,616	1,004,633
Automotive Segments | Climate Control Seat
Segment Reporting Information [Line Items]
Product revenues		482,665	426,046	393,816
Automotive Segments | Seat Heaters
Segment Reporting Information [Line Items]
Product revenues		308,588	283,970	270,054
Automotive Segments | Steering Wheel Heaters
Segment Reporting Information [Line Items]
Product revenues		153,943	120,949	102,496
Automotive Segments | Lumbar and Massage Comfort Solutions
Segment Reporting Information [Line Items]
Product revenues	[1]	144,923	56,980
Automotive Segments | Valve Systems
Segment Reporting Information [Line Items]
Product revenues	[1]	106,262	41,980
Automotive Segments | Automotive Cables
Segment Reporting Information [Line Items]
Product revenues		79,993	76,962	84,114
Automotive Segments | Battery Performance Solutions
Segment Reporting Information [Line Items]
Product revenues		75,484	71,907	69,594
Automotive Segments | Electronics
Segment Reporting Information [Line Items]
Product revenues		40,387	44,106	51,648
Automotive Segments | Other Automotive
Segment Reporting Information [Line Items]
Product revenues		30,707	38,716	32,911
Industrial Segments | Medical
Segment Reporting Information [Line Items]
Product revenues	[1]	$ 46,124	$ 43,040	$ 41,517

[1] Includes product revenues from acquisitions since their respective acquisition dates (see Note 4).