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Income Taxes
3 Months Ended
Mar. 31, 2021
Income Tax Disclosure [Abstract]  
Income Taxes
14. Income Taxes
At the end of each interim reporting period, the Company determines the income tax provision by using an estimate of the annual effective tax rate, adjusted for discrete items occurring in the quarter. The effective income
tax rate reflects the effect of federal and state income taxes and the permanent impacts of differences in book and tax accounting.
The Company’s effective tax rate was 72.1% and 5.9% for the three months ended March 31, 2020 and 2021, respectively. The change in tax rate is primarily due to the valuation allowance recorded against U.S. deferred tax assets. The Company continues to maintain a valuation allowance for its U.S. federal and state net deferred tax assets.
Judgment is required in determining whether deferred tax assets will be realized in full or in part. Management assesses the available positive and negative evidence on a jurisdictional basis to estimate if deferred tax assets will be recognized and when it is more likely than not that all or some deferred tax assets will not be realized, and a valuation allowance must be established.
The Company’s effective tax rate for the three months ended March 31, 2021 is lower than the U.S. federal statutory rate of 21.0% primarily due to the valuation allowance recorded against U.S. deferred tax assets.