LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Troubled Debt Restructuring) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	$ 18,907	$ 21,777
Nonaccrual Status	1,024	2,319
Total TDRs	19,931	24,096
Financing Receivable, Modifications, Commitments to Advance Funds	127	237
Commerical real estate - owner-occupied [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	203	181
Nonaccrual Status	96	104
Total TDRs	299	285
Commerical real estate - investment properties [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	4,304	5,834
Nonaccrual Status	0	13
Total TDRs	4,304	5,847
Multifamily real estate [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	349	357
Nonaccrual Status	0	0
Total TDRs	349	357
One-to four-family construction [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	1,180	1,741
Nonaccrual Status	0	0
Total TDRs	1,180	1,741
Land and land development - residential [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	1,106	1,151
Nonaccrual Status	0	483
Total TDRs	1,106	1,634
Commercial business [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	653	624
Nonaccrual Status	0	0
Total TDRs	653	624
Agricultural business, including secured by farmland [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	3,125	545
Nonaccrual Status	79	277
Total TDRs	3,204	822
One- to four-family residential [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	7,678	11,025
Nonaccrual Status	843	1,428
Total TDRs	8,521	12,453
Consumer secured by one- to four-family [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	143	147
Nonaccrual Status	6	14
Total TDRs	149	161
Consumer Loan [Member]
Financing Receivable, Troubled Debt Restructurings [Line Items]
Accrual Status	166	172
Nonaccrual Status	0	0
Total TDRs	$ 166	$ 172