FORECLOSURED REAL ESTATE AND REPOSSESSED ASSETS - Foreclosed and Repossessed Assets (Details) - Foreclosed Property - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Other Real Estate [Roll Forward]
Balance, beginning of period	$ 29,494	$ 31,638
Additions	5,983	105
Write-downs	568	339
Purchase price	23,086	1,905
Gain (loss) on sale	(5,039)	15
Total reductions	28,693	2,229
Balance, ending of period	$ 6,784	$ 29,514