LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Troubled Debt Restructuring) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	$ 17,193	$ 18,907
TDRs on Nonaccrual Status	1,009	1,024
Total TDRs	18,202	19,931
Commitments to advance funds related to TDRs, maximum additional amounts	147	127
Commerical real estate - owner-occupied [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	202	203
TDRs on Nonaccrual Status	94	96
Total TDRs	296	299
Commercial real estate - investment properties [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	4,284	4,304
TDRs on Nonaccrual Status	0	0
Total TDRs	4,284	4,304
Multifamily real estate [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	347	349
TDRs on Nonaccrual Status	0	0
Total TDRs	347	349
One- to four-family construction [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	1,180	1,180
TDRs on Nonaccrual Status	0	0
Total TDRs	1,180	1,180
Land and land development - residential [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	1,098	1,106
TDRs on Nonaccrual Status	0	0
Total TDRs	1,098	1,106
Commercial business [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	631	653
TDRs on Nonaccrual Status	0	0
Total TDRs	631	653
Agricultural business, including secured by farmland [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	3,111	3,125
TDRs on Nonaccrual Status	79	79
Total TDRs	3,190	3,204
One- to four-family residential [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	6,120	7,678
TDRs on Nonaccrual Status	832	843
Total TDRs	6,952	8,521
Consumer secured by one- to four-family [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	142	143
TDRs on Nonaccrual Status	4	6
Total TDRs	146	149
Consumer - other [Member]
Financing Receivable, Modifications [Line Items]
TDRs on Accrual Status	78	166
TDRs on Nonaccrual Status	0	0
Total TDRs	$ 78	$ 166