INVESTMENT SECURITIES (Schedule of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Fair Value
Less than 12 Months	$ 87,197	$ 35,976
12 Months or More	22,832	20,386
Total	110,029	56,362
Unrealized Loss
Less than 12 Months	1,809	411
12 Months or More	1,359	546
Total	3,168	957
U.S. government agency obligations
Fair Value
Less than 12 Months	25,149	8,296
12 Months or More	10,281	6,932
Total	35,430	15,228
Unrealized Loss
Less than 12 Months	358	186
12 Months or More	730	262
Total	1,088	448
Obligations of states and political subdivisions
Fair Value
Less than 12 Months	26,592	8,170
12 Months or More	3,666	3,701
Total	30,258	11,871
Unrealized Loss
Less than 12 Months	390	62
12 Months or More	168	69
Total	558	131
Mortgage-backed securities
Fair Value
Less than 12 Months	30,404	14,167
12 Months or More	8,885	9,753
Total	39,289	23,920
Unrealized Loss
Less than 12 Months	753	96
12 Months or More	461	215
Total	1,214	311
Corporate debt securities
Fair Value
Less than 12 Months	5,052	5,343
12 Months or More	0	0
Total	5,052	5,343
Unrealized Loss
Less than 12 Months	308	67
12 Months or More	0	0
Total	$ 308	$ 67