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Income Taxes
3 Months Ended
Mar. 31, 2020
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes

In calculating the provision for income taxes, the Company uses an estimate of the annual effective tax rate based upon the facts and circumstances at each interim period. On a quarterly basis, the estimated annual effective tax rate is adjusted, as appropriate, based upon changes in facts and circumstances, if any, as compared to those forecasted at the beginning of the fiscal year and at each interim period thereafter.

The provision for income taxes reflected U.S. federal, state and local taxes at an estimated effective tax rate of 91.1% and 15.8% for the three months ended March 31, 2020 and 2019, respectively. The increase in the estimated effective tax rate for the three months ended March 31, 2020 was primarily due to unrealized losses on various Company investments for which a valuation allowance is recorded.