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INCOME TAXES (Tables)
9 Months Ended
Jun. 30, 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.
Nine Months Ended June 30,
(Dollars in Thousands)20202019
Provision at statutory rate$20,041  $15,449  
Tax-exempt income(936) (2,360) 
State income taxes4,475  3,243  
Interim period effective rate adjustment(8,850) 1,397  
Tax credit investments, net - federal(9,863) (22,484) 
Research tax credit(1,709) —  
IRC 162(m) nondeductible compensation1,250  1,612  
Other, net(538) (101) 
Income tax expense (benefit)$3,870  $(3,244) 
Effective tax rate3.91 %(4.20)%