LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Impaired Loans and Related Allowance Reserve) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	$ 23,180	$ 14,562
Past due and still accruing	1,555	2,175
Troubled debt restructuring on accrual status	27,558	29,154
Total impaired loans	52,293	45,891
Nonaccrual loans, allocated reserves	264	179
Past due and still accruing, allocated reserves	10	10
Troubled debt restructuring on accrual status, allocated reserves	2,562	2,903
Allocated Reserve	2,836	3,092
Commitments to advance additional funds related to TDRs	587	2,095
Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	3,734	1,365
Past due and still accruing	0	0
Troubled debt restructuring on accrual status	183	184
Total impaired loans	3,917	1,548
Nonaccrual loans, allocated reserves	35	20
Troubled debt restructuring on accrual status, allocated reserves	4	4
Allocated Reserve	37	24
Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	407	32
Past due and still accruing	0	0
Troubled debt restructuring on accrual status	5,981	6,021
Total impaired loans	6,388	6,054
Nonaccrual loans, allocated reserves	66	5
Troubled debt restructuring on accrual status, allocated reserves	640	724
Allocated Reserve	707	729
Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	578	0
Past due and still accruing	0	0
Troubled debt restructuring on accrual status	781	786
Total impaired loans	1,359	786
Nonaccrual loans, allocated reserves	0	0
Troubled debt restructuring on accrual status, allocated reserves	83	86
Allocated Reserve	84	86
One-to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,388	0
Past due and still accruing	0	0
Troubled debt restructuring on accrual status	2,772	3,923
Total impaired loans	4,160	3,923
Nonaccrual loans, allocated reserves	0	0
Troubled debt restructuring on accrual status, allocated reserves	454	640
Allocated Reserve	454	640
Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,265	1,275
Past due and still accruing	0	0
Troubled debt restructuring on accrual status	1,279	1,279
Total impaired loans	2,543	2,554
Nonaccrual loans, allocated reserves	0	0
Troubled debt restructuring on accrual status, allocated reserves	354	346
Allocated Reserve	354	346
Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	4,870	0
Past due and still accruing	0	0
Total impaired loans	4,870
Nonaccrual loans, allocated reserves	0	0
Allocated Reserve	0
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	418	537
Past due and still accruing	0	0
Troubled debt restructuring on accrual status	724	739
Total impaired loans	1,143	1,276
Nonaccrual loans, allocated reserves	44	46
Troubled debt restructuring on accrual status, allocated reserves	78	82
Allocated Reserve	122	128
Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,566	1,597
Past due and still accruing	0	0
Troubled debt restructuring on accrual status	289	0
Total impaired loans	1,855	1,597
Nonaccrual loans, allocated reserves	66	26
Troubled debt restructuring on accrual status, allocated reserves	3	0
Allocated Reserve	69	26
One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	7,111	8,507
Past due and still accruing	1,548	2,095
Troubled debt restructuring on accrual status	15,127	15,792
Total impaired loans	23,786	26,394
Nonaccrual loans, allocated reserves	15	35
Past due and still accruing, allocated reserves	10	10
Troubled debt restructuring on accrual status, allocated reserves	916	987
Allocated Reserve	941	1,032
Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	951	838
Past due and still accruing	6	80
Troubled debt restructuring on accrual status	232	233
Total impaired loans	1,189	1,151
Nonaccrual loans, allocated reserves	38	47
Past due and still accruing, allocated reserves	0	0
Troubled debt restructuring on accrual status, allocated reserves	24	28
Allocated Reserve	62	75
Consumer - other [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	892	411
Past due and still accruing	1	0
Troubled debt restructuring on accrual status	190	197
Total impaired loans	1,083	608
Nonaccrual loans, allocated reserves	0	0
Past due and still accruing, allocated reserves	0	0
Troubled debt restructuring on accrual status, allocated reserves	6	6
Allocated Reserve	$ 6	$ 6