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Income Taxes
 6 Months Ended
Jun. 30, 2022
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Our provision for income taxes on a consolidated basis was $120.8 million for the three months ended June 30, 2022 as compared to a provision for income taxes of $133.4 million for the three months ended June 30, 2021. The decrease of $12.7 million is primarily related to the recognition of a net discrete tax benefit for certain state tax attributes.

Our provision for income taxes on a consolidated basis was $117.0 million for the six months ended June 30, 2022 as compared to a provision for income taxes of $209.8 million for the six months ended June 30, 2021. The decrease of $92.7 million is primarily related to the recognition of a net discrete tax benefit attributable to an outside basis difference recognized as a result of legal entity restructuring. The recognition of the outside tax basis difference generated tax attribute carry forwards that will offset income generated during the current year and be carried forward. Based on our strong history of earnings and the nature of our business we expect to generate sufficient taxable income within the carry forward period and therefore conclude it is more likely than not that we will realize the full tax benefit of the tax attributes. Accordingly, we have not provided any valuation allowance against the deferred tax assets.

Our effective tax rate decreased to 19.8% for the three months ended June 30, 2022 from 23.1% for the three months ended June 30, 2021. Our effective tax rate decreased to 11.7% for the six months ended June 30, 2022 from 22.7% for the six months ended June 30, 2021. Our effective tax rate for the three and six months ended June 30, 2022 was different than the U.S. federal statutory tax rate of 21.0% primarily due to the recognition of a net discrete tax benefit attributable to an outside basis difference recognized as a result of legal entity restructuring and certain state tax benefits.

As of June 30, 2022 and December 31, 2021, the company had gross unrecognized tax benefits of $341.1 million and $191.9 million, respectively. The increase of $149.2 million resulted from accrual of gross unrecognized tax benefits of $151.0 million primarily related to certain legal entity reorganizations and a release of $1.8 million of gross unrecognized tax benefits primarily related to the expiration of statute of limitations in various tax jurisdictions.