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INCOME TAXES (Tables)
 3 Months Ended
Dec. 31, 2019
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation
The table below compares the income tax expense components for the periods presented.
Three Months Ended December 31,
2019
 
2018
(Dollars in Thousands)
 
 
 
Provision at statutory rate
$
4,567

 
$
3,072

Tax-exempt income
(294
)
 
(1,201
)
State income taxes
1,090

 
701

Interim period effective rate adjustment
860

 
5,263

Tax credit investments, net - federal
(4,800
)
 
(9,568
)
Research tax credit
(1,709
)
 
—

IRC 162(m) nondeductible compensation
838

 
—

Other, net
128

 
42

Income tax expense (benefit)
$
680

 
$
(1,691
)
Effective tax rate
2.97
%
 
(11.56
)%