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Income Taxes
6 Months Ended
Jun. 30, 2020
Income Taxes [Abstract]  
Income Taxes (8) Income Taxes

The consolidated income tax expense for the three and six months ended June 30, 2020 and 2019, was determined based upon estimates of the Company’s consolidated annual effective income tax rate for the years ending December 31, 2020 and 2019, respectively. The difference between the consolidated annual effective income tax rate and the U.S. federal statutory rate is primarily attributable to foreign income taxes, state income taxes and the effect of certain permanent differences.

The Company’s estimated effective tax rate before discrete items was 8.2% at June 30, 2020, compared to an effective tax rate of 5.6% at June 30, 2019. Discrete items during the three and six months ended June 30, 2020 primarily related to the impairment of railcar assets (Note 4) of $19.2 million, which resulted in a tax benefit of $4.5 million.

The Company accounts for uncertain tax positions based on an evaluation as to whether it is more likely than not that a position will be sustained on audit, including resolution of any related appeals or litigation processes. This evaluation is based on all available evidence and assumes that the appropriate tax authorities have full knowledge of all relevant information concerning the tax position. Once it has been determined that a tax position is more likely than not to be sustained on its technical merits, the tax benefit recognized is based on the largest amount that is greater than 50% likely of being realized upon ultimate settlement. As of June 30, 2020, the Company had unrecognized tax benefits of $0.3 million, which if recognized, would reduce the Company’s effective tax rate. Total accrued interest relating to unrecognized tax benefits was $0.1 million as of June 30, 2020. The Company does not believe the total amount of unrecognized tax benefits as of June 30, 2020 will change for the remainder of 2020.