Segment Reporting - Product Revenues Information by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Product revenues	$ 260,715	$ 266,005	$ 528,372	$ 554,540
Revenue, Product and Service [Extensible Enumeration]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
United States
Segment Reporting Information [Line Items]
Product revenues	$ 102,617	$ 102,174	$ 206,738	$ 217,461
China
Segment Reporting Information [Line Items]
Product revenues	31,391	33,857	69,744	67,372
South Korea
Segment Reporting Information [Line Items]
Product revenues	23,706	25,516	44,881	50,156
Germany
Segment Reporting Information [Line Items]
Product revenues	15,565	16,350	35,351	35,530
Romania
Segment Reporting Information [Line Items]
Product revenues	11,519	14,866	24,273	29,951
Japan
Segment Reporting Information [Line Items]
Product revenues	12,886	17,633	24,702	35,553
Other
Segment Reporting Information [Line Items]
Product revenues	63,032	55,609	122,682	118,517
Non U.S.
Segment Reporting Information [Line Items]
Product revenues	$ 158,098	$ 163,831	$ 321,634	$ 337,079