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Segment Reporting - Segment Information About Reported Segment Product Revenues by Product Category (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Product revenues		$ 386,870	$ 371,512	$ 1,115,814	$ 1,103,210
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues		374,211	358,804	1,079,937	1,067,444
Automotive Segments | Climate Control Seats
Segment Reporting Information [Line Items]
Product revenues	[1]	201,275	189,898	592,448	581,713
Automotive Segments | Lumbar and Massage Comfort Solutions
Segment Reporting Information [Line Items]
Product revenues		55,799	48,970	153,642	133,090
Automotive Segments | Climate Control Interiors
Segment Reporting Information [Line Items]
Product revenues	[1]	52,638	49,283	147,564	140,712
Automotive Segments | Climate and Comfort Electronics
Segment Reporting Information [Line Items]
Product revenues	[1]	8,599	4,883	22,220	13,266
Automotive Segments | Automotive Climate and Comfort Solutions
Segment Reporting Information [Line Items]
Product revenues		318,311	293,034	915,874	868,781
Automotive Segments | Valve Systems
Segment Reporting Information [Line Items]
Product revenues		24,487	26,082	72,803	81,974
Automotive Segments | Other Automotive
Segment Reporting Information [Line Items]
Product revenues	[1]	31,413	39,688	91,260	116,689
Industrial Segments | Medical
Segment Reporting Information [Line Items]
Product revenues		$ 12,659	$ 12,708	$ 35,877	$ 35,766
[1] Product categories have been modified, and prior-period amounts have been recast to conform with the current period presentation. Climate Control Seats (CCS) includes CCS Heat (previously Seat Heaters), CCS Vent/CCS Active Cool (previously CCS) and CCS Neck Conditioners (previously included in Other Automotive). Climate Control Interiors (CCI) includes CCI Steering Wheel Heat and CCI Interior Heat (previously included in Other Automotive). Other Automotive includes Automotive Cables, Battery Performance Solutions, non-automotive electronics and contract manufacturing electronics (previously classified as Electronics).

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