Segment Reporting - Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Product revenues	$ 266,005	$ 136,061	$ 554,540	$ 364,674
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 9,717	$ 10,082	$ 19,571	$ 20,488
Operating income (loss)	31,672	(9,897)	72,421	8,804
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	$ 255,105	$ 124,386	$ 534,475	$ 340,858
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 8,892	$ 9,295	$ 17,945	$ 18,787
Operating income (loss)	43,544	(2,617)	96,660	25,837
Medical Segments
Segment Reporting Information [Line Items]
Product revenues	$ 10,900	$ 11,675	$ 20,065	$ 23,816
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 580	$ 573	$ 1,164	$ 1,178
Operating income (loss)	$ 113	$ 903	$ (418)	$ 1,867
Corporate Segments
Segment Reporting Information [Line Items]
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 245	$ 214	$ 462	$ 523
Operating income (loss)	$ (11,985)	$ (8,183)	$ (23,821)	$ (18,900)