Revenue, Credit Concentrations and Geographic Information - Disaggregates of Total Revenues from External Customers and Collaborative Partners by Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from External Customer [Line Items]
Total revenues	$ 429,485	$ 387,763	$ 931,554	$ 788,508
United States
Revenue from External Customer [Line Items]
Total revenues	232,552	169,407	476,724	360,343
Europe
Revenue from External Customer [Line Items]
Total revenues	109,259	119,561	254,295	244,100
Latin America
Revenue from External Customer [Line Items]
Total revenues	37,864	46,494	97,788	80,333
Rest of world
Revenue from External Customer [Line Items]
Total revenues	$ 49,810	$ 52,301	$ 102,747	$ 103,732