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Income Taxes
 6 Months Ended
Jun. 30, 2024
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The following table presents our income tax provision and our income tax rate for the three and six months ended June 30, 2024 and 2023 (in thousands, except percentages):
 
For the three months ended
June 30,
For the six months ended
June 30,
 2024202320242023
Income tax provision$91,563 $53,098 $162,130 $94,429 
Income tax rate27.0 %27.4 %26.7 %27.3 %
The difference between the U.S. statutory tax rate of 21% and our effective income tax rate for both the three and six months ended June 30, 2024 and 2023 was primarily a result of state and local income taxes and other permanent book-to-tax differences.
The increase in our income tax provision for the three and six months ended June 30, 2024, when compared to the three and six months ended June 30, 2023, was predominantly due to greater income before income taxes. The decrease in our effective income tax rate for the three and six months ended June 30, 2024, when compared to the three and six months ended June 30, 2023, was attributable to the impact of favorable discrete tax items during the first half of 2024.
As of June 30, 2024 and December 31, 2023, we had no unrecognized income tax benefits.
We file a consolidated federal income tax return including all of our U.S. subsidiaries with the Internal Revenue Service. We additionally file income tax returns with various state, local, and foreign tax agencies. Our income tax returns are subject to audit by various taxing authorities and are currently under examination for the years 2019 through 2021.