Income Taxes

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Income Taxes

Income TaxesOur effective income tax rate was 20.6% and 14.2% for the three months ended March 31, 2020 and 2019, respectively. The increase from the first quarter of 2019 was primarily due to the decrease in current quarter reversals of reserves for uncertain tax

positions and the decrease in excess tax deductions on stock-based compensation, partially offset by the beneficial impact of changes in valuation allowance against deferred tax assets associated with carried over research and development credits.

The total amount of unrecognized tax benefits as of March 31, 2020 was $11.0 million, of which $10.6 million would affect our effective tax rate if recognized.

We recognize interest and penalties related to unrecognized tax benefits through income tax expense. As of March 31, 2020, we had $0.9 million accrued for the payment of interest.

We are subject to taxation in the U.S. and various state and foreign jurisdictions. With few exceptions, we are no longer subject to examinations by tax authorities for years prior to 2015.