Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Product revenues	$ 243,384	$ 259,540	$ 797,924	$ 624,214
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
United States
Segment Reporting Information [Line Items]
Product revenues	$ 96,683	$ 111,189	$ 314,144	$ 264,204
Germany
Segment Reporting Information [Line Items]
Product revenues	16,011	14,553	51,541	41,144
South Korea
Segment Reporting Information [Line Items]
Product revenues	20,894	23,260	71,050	60,062
Japan
Segment Reporting Information [Line Items]
Product revenues	17,054	15,280	52,607	40,766
China
Segment Reporting Information [Line Items]
Product revenues	32,198	27,363	99,570	63,883
Other
Segment Reporting Information [Line Items]
Product revenues	60,544	67,895	209,012	154,155
Non U.S.
Segment Reporting Information [Line Items]
Product revenues	$ 146,701	$ 148,351	$ 483,780	$ 360,010