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Income Taxes
 9 Months Ended
Sep. 30, 2021
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 nine months ended September 30, 2021 and 2020 (in thousands, except percentages):
 For the three months ended
September 30,		For the nine months ended
September 30,
 2021202020212020
Income tax provision$37,303 $73,936 $104,523 $62,179 
Income tax rate27.2 %54.7 %27.1 %53.9 %
The difference between the U.S. statutory tax rate of 21% and our income tax rate for both the three and nine months ended September 30, 2021 and 2020 was primarily a result of state and local income taxes and other permanent book to tax differences, including, in the case of the three and nine months ended September 30, 2020, the tax-effect of the $232.8 million of non-cash goodwill, identifiable intangible asset, and other long-lived asset impairment charges recorded during the second quarter of 2020, the majority of which were non-deductible for tax purposes.
As of September 30, 2021 and December 31, 2020, 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 2015 through 2019.