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INCOME TAXES (Tables)
9 Months Ended
Jun. 30, 2022
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)20222021
Provision at statutory rate$34,063 $28,435 
Tax-exempt income(541)(674)
State income taxes6,728 6,120 
Interim period effective rate adjustment(2,849)(5,181)
Tax credit investments, net - federal(6,994)(18,854)
Research tax credit(355)(323)
IRC 162(m) nondeductible compensation801 677 
Other, net(1,617)(600)
Income tax expense$29,236 $9,600 
Effective tax rate17.77 %6.92 %