Income Tax Provision	9 Months Ended
Income Tax Provision	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Tax Provision	Income Tax Provision We had an effective income tax rate of 21.3% and negative 11.1% for the three and nine months ended September 30, 2020, respectively, compared to 0.4% and 11.0% for the three and nine months ended September 30, 2019, respectively. The increase in the effective tax rates for the three months ended September 30, 2020, as compared to the same periods in 2019, was principally driven by the decrease in the excess tax benefits related to stock incentive awards. The decrease in the effective tax rate for the nine months ended September 30, 2020, as compared to the same period in 2019, was principally driven by an increase in the excess tax benefits related to stock incentive awards. The effective income tax rates for the periods presented were different from the statutory United States federal income tax rate of 21% primarily due to excess tax benefits related to stock incentive awards, state income taxes, non-deductible business expenses, and the tax benefit of research tax credits. The excess tax benefits related to stock incentive awards realized was $2.5 million and $48.0 million for the three and nine months ended September 30, 2020, respectively, compared to $11.6 million and $18.6 million for the three and nine months ended September 30, 2019, respectively. Excluding the excess tax benefits, the effective tax rate was 26.2% and 26.7% for the three and nine months ended September 30, 2020, respectively, compared to 28.9 % and 27.6 % for the three and nine months ended September 30, 2019, respectively. We made tax payments of $2.6 million and $18.1 million in the nine months ended September 30, 2020, and 2019, respectively.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.