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Income Taxes
 3 Months Ended
Mar. 31, 2021
Income Tax Disclosure [Abstract]  
Income Taxes Income TaxesThe Company calculates its interim income tax provision by estimating the annual expected effective tax rate and applying that rate to its ordinary year-to-date earnings or loss. In addition, the effect of changes in enacted tax laws, rates or tax status is recognized in the interim period in which the change occurs.For the three months ended March 31, 2021 and 2020, the effective tax rate was approximately 65.7% and 203.7%, respectively, based on the annual effective tax rate net of discrete federal and state taxes. For the three months ended March 31, 2021 and 2020, the statutory tax rate was 21.0%. The computation of the effective tax rate includes modifications from the statutory rate such as income tax credits, tax depletion deduction, carrybacks, and state apportionment changes, among other items.