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Income Taxes | 6 Months Ended
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Mar. 31, 2024
Income Tax Disclosure [Abstract] |
Income Taxes | Income Taxes The calculation of the effective tax rate is as follows (in thousands):
| Three months ended March 31, |  | Six months ended March 31,
| 2024 |  | 2023 |  | 2024 |  | 2023
Income before income taxes | $ | 43,917 |  |  | $ | 10,973 |  |  | $ | 73,795 |  |  | $ | 12,587 |
Income tax provision | 10,429 |  |  | 2,500 |  |  | 16,222 |  |  | 2,951 |
Net income | $ | 33,488 |  |  | $ | 8,473 |  |  | $ | 57,573 |  |  | $ | 9,636 |
Effective tax rate | 24 | % |  | 23 | % |  | 22 | % |  | 23 | %
Our income tax provision reflects an effective tax rate on pre-tax income of 24% and 22% for the three and six months ended March 31, 2024, respectively, compared to 23% for both the three and six months ended March 31, 2023. The effective tax rate for the three and six months ended March 31, 2024 was favorably impacted by the estimated Research and Development Tax Credit (R&D Tax Credit) as well as discrete items related to the vesting of RSUs and the release of a reserve for unrecognized tax benefits upon expiration of the statute of limitations. These items were offset by an inclusion related to U.S. global intangible income and the tax expense related to certain nondeductible expenses. The effective tax rate for the three and six months ended March 31, 2023 was favorably impacted by the estimated R&D Tax Credit and the projected utilization of net operating loss carryforwards in the U.K. that had been fully reserved with a valuation allowance. The favorable impacts were offset by state income tax expense, certain nondeductible expenses and an income inclusion related to U.S. global intangible income.

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480990/946-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//740/tableOfContent Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-14 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-21 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 270 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482526/740-270-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 17 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-17 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.5.Q1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479360/740-10-S99-2 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482603/740-30-50-2 + Details
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