Segment Reporting - Segment Information About Reported Segment Product Revenues by Product Category (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Segment Reporting Information [Line Items]
Product revenues	$ 405,102	$ 386,870	$ 1,214,974	$ 1,115,814
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	390,597	374,211	1,177,578	1,079,937
Automotive Segments \| Climate Control Seats
Segment Reporting Information [Line Items]
Product revenues	215,603	201,275	639,656	592,448
Automotive Segments \| Lumbar and Massage Comfort Solutions
Segment Reporting Information [Line Items]
Product revenues	70,923	55,799	205,772	153,642
Automotive Segments \| Climate Control Interiors
Segment Reporting Information [Line Items]
Product revenues	51,939	52,638	155,241	147,564
Automotive Segments \| Climate and Comfort Electronics
Segment Reporting Information [Line Items]
Product revenues	7,925	8,599	25,831	22,220
Automotive Segments \| Automotive Climate and Comfort Solutions
Segment Reporting Information [Line Items]
Product revenues	346,390	318,311	1,026,500	915,874
Automotive Segments \| Valve Systems
Segment Reporting Information [Line Items]
Product revenues	21,596	24,487	73,271	72,803
Automotive Segments \| Other Automotive
Segment Reporting Information [Line Items]
Product revenues	22,611	31,413	77,807	91,260
Medical Segments \| Medical
Segment Reporting Information [Line Items]
Product revenues	$ 14,505	$ 12,659	$ 37,396	$ 35,877