Income Taxes	3 Months Ended
Mar. 31, 2018
Income Taxes
Income Taxes	Note 9 — Income Taxes The Company’s effective tax rate for the three months ended March 31, 2018 was 19.1%. The Company’s effective tax rate for the three months ended March 31, 2018 varied from the federal statutory rate of 21.0% primarily due to a $4.3 million discrete tax benefit from excess tax deductions generated from employee equity transactions that occurred during the three months ended March 31, 2018 pursuant to ASU 2016‑09, partially offset by the provision for state income taxes and the impact of non-deductible crew per diem meal expenses. In connection with the Tax Cuts and Jobs Act of 2017 (“Tax Act”) enacted in December 2017, the Company recorded a provisional amount of income tax benefit of $246.8 million related to the remeasurement of deferred tax balances for the year ended December 31, 2017. In accordance with relevant SEC guidance, the effects of the Tax Act may be adjusted within a one-year measurement period from the enactment date for the items that were previously reported as provisional, or where a provisional estimate could not be made. The income tax provision for the three-months ended March 31, 2018 did not reflect any adjustments to the provisional amounts as of December 31, 2017. The Company is still analyzing the impacts of the Tax Act on $13.9 million of alternative minimum tax credits that may be refundable and has not recorded a provisional amount as of March 31, 2018. The Company will continue to assess forthcoming guidance and accounting interpretations on the effects of the Tax Act and expects to complete its analysis within the measurement period in accordance with SEC guidance.

Note 9 — Income Taxes

The Company’s effective tax rate for the three months ended March 31, 2018 was 19.1%. The Company’s effective tax rate for the three months ended March 31, 2018 varied from the federal statutory rate of 21.0% primarily due to a $4.3 million discrete tax benefit from excess tax deductions generated from employee equity transactions that occurred during the three months ended March 31, 2018 pursuant to ASU 2016‑09, partially offset by the provision for state income taxes and the impact of non-deductible crew per diem meal expenses.

In connection with the Tax Cuts and Jobs Act of 2017 (“Tax Act”) enacted in December 2017, the Company recorded a provisional amount of income tax benefit of $246.8 million related to the remeasurement of deferred tax balances for the year ended December 31, 2017. In accordance with relevant SEC guidance, the effects of the Tax Act may be adjusted within a one-year measurement period from the enactment date for the items that were previously reported as provisional, or where a provisional estimate could not be made. The income tax provision for the three-months ended March 31, 2018 did not reflect any adjustments to the provisional amounts as of December 31, 2017. The Company is still analyzing the impacts of the Tax Act on $13.9 million of alternative minimum tax credits that may be refundable and has not recorded a provisional amount as of March 31, 2018. The Company will continue to assess forthcoming guidance and accounting interpretations on the effects of the Tax Act and expects to complete its analysis within the measurement period in accordance with SEC guidance.