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INCOME TAXES (Tables) | 6 Months Ended
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Mar. 31, 2020
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation | The table below compares the income tax expense components for the periods presented.
| Six Months Ended March 31, |  |
(Dollars in Thousands) | 2020 |  | 2019
Provision at statutory rate | $ | 16,730 |  |  | $ | 9,541 |
Tax-exempt income | (591) |  |  | (1,824) |
State income taxes | 3,682 |  |  | 2,143 |
Interim period effective rate adjustment | (3,321) |  |  | (3,968) |
Tax credit investments, net - federal | (9,536) |  |  | (9,568) |
Research tax credit | (1,709) |  |  | — |
IRC 162(m) nondeductible compensation | 1,019 |  |  | 1,561 |
Other, net | 23 |  |  | 29 |
Income tax expense (benefit) | $ | 6,297 |  |  | $ | (2,086) |
Effective tax rate | 7.66 | % |  | (4.40) | %

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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