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Income Taxes
 9 Months Ended
Sep. 30, 2023
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Our provision for income taxes on a consolidated basis was $30.6 million for the three months ended September 30, 2023 as compared to a provision for income taxes of $142.7 million for the three months ended September 30, 2022. The decrease of $112.1 million is primarily related to a decrease in earnings. Our effective tax rate decreased to 13.2% for the three months ended September 30, 2023 from 24.0% for the three months ended September 30, 2022.
Our provision for income taxes on a consolidated basis was $114.0 million for the nine months ended September 30, 2023 as compared to a provision for income taxes of $259.7 million for the nine months ended September 30, 2022. The decrease of $145.7 million is primarily related to a decrease in earnings, offset by a one-time tax benefit in 2022 as a result of legal entity restructuring. Our effective tax rate increased to 17.6% for the nine months ended September 30, 2023 from 16.3% for the nine months ended September 30, 2022.
Our effective tax rates for the three and nine months ended September 30, 2023 were different than the U.S. federal statutory tax rate of 21.0% primarily due to U.S. state taxes, favorable permanent book tax differences and discrete tax benefits including tax return filings in various jurisdictions.
As of September 30, 2023 and December 31, 2022, the company had gross unrecognized tax benefits of $402.6 million and $391.4 million, respectively. The increase of $11.2 million resulted from the accrual of gross unrecognized tax benefits offset by the release of gross unrecognized tax benefits due to the expiration of statute of limitations in various tax jurisdictions.