Income Taxes	3 Months Ended
Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesOur overall effective income tax rates were 23.3% and 24.3% for the three months ended March 31, 2021 and 2020, respectively, resulting in income tax expense of $33.6 million and $11.8 million for the same periods, respectively. The year-over-year decrease in our effective tax rate for the three months ended March 31, 2021 was primarily due to an increase in the estimated amount of energy tax credits to be recognized during the year. This benefit was partially offset by a decrease in the windfall on non-qualifying stock options exercised and lapsed restricted stock awards and a decrease in the amount of executive compensation that is deductible under Internal Revenue Code Section 162(m) during the period.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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