Segment Reporting - Segment Information About Reported Segment Product Revenues by Product Category (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Product revenues		$ 366,195	$ 332,962	$ 1,102,143	$ 861,334
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues		354,782	322,555	1,069,007	829,570
Automotive Segments | Climate Control Seat
Segment Reporting Information [Line Items]
Product revenues		124,905	112,059	360,868	311,281
Automotive Segments | Seat Heaters
Segment Reporting Information [Line Items]
Product revenues		77,238	75,568	231,132	210,367
Automotive Segments | Steering Wheel Heaters
Segment Reporting Information [Line Items]
Product revenues		39,861	31,482	115,166	89,169
Automotive Segments | Lumbar and Massage Comfort Solutions
Segment Reporting Information [Line Items]
Product revenues	[1]	33,260	22,740	109,602	22,740
Automotive Segments | Valve System
Segment Reporting Information [Line Items]
Product revenues	[1]	27,830	18,542	82,516	18,542
Automotive Segments | Automotive Cables
Segment Reporting Information [Line Items]
Product revenues		19,668	18,338	60,131	59,662
Automotive Segments | Battery Performance Solutions
Segment Reporting Information [Line Items]
Product revenues		17,242	20,331	57,138	55,395
Automotive Segments | Electronics
Segment Reporting Information [Line Items]
Product revenues		10,163	12,083	30,456	33,190
Automotive Segments | Other Automotive
Segment Reporting Information [Line Items]
Product revenues		4,615	11,412	21,998	29,224
Industrial Segments | Medical Segments
Segment Reporting Information [Line Items]
Product revenues	[2]	$ 11,413	$ 10,407	$ 33,136	$ 31,764

[1] Represents Product revenues from Alfmeier (acquired on August 1, 2022) - (see Note 2)

[2] Includes Product revenues of $1,988 and $4,939 for the three and nine months ended September 30, 2023, respectively, and $1,234 for the three and nine months ended September 30, 2022 from Dacheng (acquired on July 13, 2022) - (see Note 2)