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INCOME TAXES (Tables)
9 Months Ended
Jun. 30, 2024
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation
The table below compares the income tax expense components for the periods presented.
Nine Months Ended June 30,
(Dollars in thousands)20242023
Provision at statutory rate$33,778 $30,808 
Tax-exempt income(522)(600)
State income taxes6,518 6,109 
Interim period effective rate adjustment(593)(3,065)
Tax credit investments, net - federal(12,556)(13,669)
Research tax credit(602)(805)
IRC 162(m) nondeductible compensation826 928 
Other, net(761)(710)
Income tax expense$26,088 $18,996 
Effective tax rate16.15 %12.80 %