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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, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Product revenues	$ 1,046,150	$ 913,098	$ 971,684
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	1,004,633	869,998	920,225
Automotive Segments | Climate Control Seat
Segment Reporting Information [Line Items]
Product revenues	393,816	342,550	359,355
Automotive Segments | Seat Heaters
Segment Reporting Information [Line Items]
Product revenues	270,054	249,665	284,174
Automotive Segments | Steering Wheel Heaters
Segment Reporting Information [Line Items]
Product revenues	102,496	76,272	65,426
Automotive Segments | Automotive Cables
Segment Reporting Information [Line Items]
Product revenues	84,114	73,997	88,031
Automotive Segments | Battery Performance Solutions
Segment Reporting Information [Line Items]
Product revenues	69,594	50,901	41,498
Automotive Segments | Electronics
Segment Reporting Information [Line Items]
Product revenues	51,648	53,238	47,542
Automotive Segments | Other Automotive
Segment Reporting Information [Line Items]
Product revenues	32,911	23,375	34,199
Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	41,517	43,100	51,459
Industrial Segments | Medical
Segment Reporting Information [Line Items]
Product revenues	$ 41,517	$ 43,100	36,860
Industrial Segments | GPT
Segment Reporting Information [Line Items]
Product revenues			11,181
Industrial Segments | CSZ-IC
Segment Reporting Information [Line Items]
Product revenues			$ 3,418

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