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INCOME TAXES (Tables) | 9 Months Ended
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Jun. 30, 2019
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation | The Company’s effective tax rate in the future will depend in part on actual investment tax credits earned as part of its financing of solar energy projects. The table below compares the income tax expense components for the periods presented.
Nine Months Ended June 30, | 2019 |  | 2018
(Dollars in Thousands) |  |  |
Provision at statutory rate | $ | 15,449 |  |  | $ | 13,639 |
Tax-exempt income | (2,360 | ) |  | (5,506 | )
State income taxes | 3,243 |  |  | 2,314 |
Interim period effective rate adjustment | 1,397 |  |  | (1,070 | )
Tax credit investments, net - federal | (22,484 | ) |  | — |
Tax Reform rate adjustment | — |  |  | 3,635 |
IRC 162(m) nondeductible compensation | 1,612 |  |  | — |
Other, net | (101 | ) |  | (304 | )
Income tax expense | $ | (3,244 | ) |  | $ | 12,708 |
Effective tax rate | (4.2 | %) |  | 22.9 | %

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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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