Segment Reporting - Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Product revenues	$ 288,535	$ 228,613
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 9,854	$ 10,406
Operating income (loss)	40,749	18,701
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	$ 279,370	$ 216,472
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 9,053	$ 9,492
Operating income (loss)	53,116	28,454
Medical Segments
Segment Reporting Information [Line Items]
Product revenues	$ 9,165	$ 12,141
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 584	$ 606
Operating income (loss)	$ (531)	$ 964
Corporate Segments
Segment Reporting Information [Line Items]
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 217	$ 308
Operating income (loss)	$ (11,836)	$ (10,717)