INCOME TAXES - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provision at statutory rate	$ 3,072	$ 2,540
Tax-exempt income	(1,201)	(2,068)
State income taxes	701	718
Interim period effective rate adjustment	5,263	717
Tax credit investments, net - federal	(9,568)	0
Tax Reform rate adjustment	0	3,635
Other, net	42	142
Income tax expense	$ (1,691)	$ 5,684
Effective tax rate	(11.56%)	54.90%

Effective Income Tax Rate Reconciliation, Tax Credit, Tax Cuts and Jobs Act of 2017

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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