Income Tax	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Tax	Income TaxOur effective tax rate may vary from the U.S. federal statutory tax rate due to the change in the mix of earnings in various state jurisdictions with different statutory rates, benefits related to tax credits, and the tax impact of non-deductible expenses, stock award activities and other permanent differences between income before income taxes and taxable income. The effective tax rate for the three and nine months ended September 30, 2021 was 10.1% and (15.1)%, respectively. The variance from the U.S. federal statutory tax rate of 21% for the three and nine months ended September 30, 2021 was due primarily to the $3.8 million and $37.6 million tax benefits associated with the Pfenex CVR adjustment recorded during the second and third quarters of 2021, respectively, due to the lower probability of achieving the specific development and regulatory milestone by December 31, 2021 as defined by the Pfenex CVR. Also contributing to the variance from the federal statutory rate are excess tax windfalls from share-based compensation due to increased stock option exercise activity, stock award vesting and appreciation of our stock price during the period. The effective tax rate for the three and nine months ended September 30, 2020 was 42.3% and 37.1%, respectively. The variances from the U.S. federal statutory tax rate of 21% for the three and nine months ended September 30, 2020 were primarily attributable to the mix of earnings in the jurisdictions with lower statutory rates than the U.S. offset by tax deductions related to stock award activities and tax deductions related to foreign derived intangible income.