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INCOME TAXES | 6 Months Ended
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Mar. 31, 2023
Income Tax Disclosure [Abstract] |
INCOME TAXES | INCOME TAXES The Company recorded an income tax expense of $15.8 million for the six months ended March 31, 2023, resulting in an effective tax rate of 15.83%, compared to an income tax expense of $22.3 million, or an effective tax rate of 16.66%, for the six months ended March 31, 2022. The Company’s effective tax rate was lower than the U.S. statutory rate of 21% primarily because of the anticipated 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.
| Six Months Ended March 31,
(Dollars in thousands) | 2023 |  | 2022
Provision at statutory rate | $ | 20,657 |  |  | $ | 27,899 |
Tax-exempt income | (398) |  |  | (362) |
State income taxes | 4,285 |  |  | 5,543 |
Interim period effective rate adjustment | (483) |  |  | (3,870) |
Tax credit investments, net - federal | (7,916) |  |  | (5,978) |
Research tax credit | (805) |  |  | (355) |
IRC 162(m) nondeductible compensation | 576 |  |  | 505 |
Other, net | (163) |  |  | (1,104) |
Income tax expense | $ | 15,753 |  |  | $ | 22,278 |
Effective tax rate | 15.83 | % |  | 16.66 | %

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 21 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 17 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.5.Q1) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 270 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI https://asc.fasb.org/topic&trid=2144680 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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