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INCOME TAXES | 9 Months Ended
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Jun. 30, 2023
Income Tax Disclosure [Abstract] |
INCOME TAXES | INCOME TAXES The Company recorded an income tax expense of $19.0 million for the nine months ended June 30, 2023, resulting in an effective tax rate of 12.80%, compared to an income tax expense of $29.2 million, or an effective tax rate of 17.77%, for the nine months ended June 30, 2022. The Company’s effective tax rate was lower than the U.S. statutory rate of 21% primarily because of the effect of investment tax credits during fiscal year 2023. The Company's effective tax rate in the future will depend in part on actual investment tax credits generated from qualified renewable energy property. The table below compares the income tax expense components for the periods presented.
| Nine Months Ended June 30,
(Dollars in thousands) | 2023 |  | 2022
Provision at statutory rate | $ | 30,808 |  |  | $ | 34,063 |
Tax-exempt income | (600) |  |  | (541) |
State income taxes | 6,109 |  |  | 6,728 |
Interim period effective rate adjustment | (3,065) |  |  | (2,849) |
Tax credit investments, net - federal | (13,669) |  |  | (6,994) |
Research tax credit | (805) |  |  | (355) |
IRC 162(m) nondeductible compensation | 928 |  |  | 801 |
Other, net | (710) |  |  | (1,617) |
Income tax expense | $ | 18,996 |  |  | $ | 29,236 |
Effective tax rate | 12.80 | % |  | 17.77 | %

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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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