LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Impaired Loans and Related Allowance Reserve) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	$ 14,562	$ 21,908
Loans past due and still accruing	2,175	2,860
Troubled debt restructuring on accrual	29,154	47,428
Total impaired loans	45,891	72,196
Nonaccrual loans, allocated reserves	179	494
Loans past due and still accruing, allocated reserves	10	25
Troubled debt restructuring on accrual, allocated reserves	2,903	4,958
Total impaired loans, allocated reserves	3,092	5,477
Commitments to advance funds to TDRs	2,100	225
Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,365	2,466
Loans past due and still accruing	0	0
Troubled debt restructuring on accrual	184	186
Total impaired loans	1,548	2,652
Nonaccrual loans, allocated reserves	20	31
Troubled debt restructuring on accrual, allocated reserves	4	4
Total impaired loans, allocated reserves	24	35
Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	32	3,821
Loans past due and still accruing	0	0
Troubled debt restructuring on accrual	6,021	5,367
Total impaired loans	6,054	9,188
Nonaccrual loans, allocated reserves	5	89
Troubled debt restructuring on accrual, allocated reserves	724	415
Total impaired loans, allocated reserves	729	504
Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Loans past due and still accruing	0	0
Troubled debt restructuring on accrual	786	5,744
Total impaired loans	786	5,744
Troubled debt restructuring on accrual, allocated reserves	86	1,139
Total impaired loans, allocated reserves	86	1,139
One-to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	0	269
Loans past due and still accruing	0	0
Troubled debt restructuring on accrual	3,923	6,864
Total impaired loans	3,923	7,133
Nonaccrual loans, allocated reserves	0	0
Troubled debt restructuring on accrual, allocated reserves	640	1,002
Total impaired loans, allocated reserves	640	1,002
Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,275	924
Loans past due and still accruing	0	0
Troubled debt restructuring on accrual	1,279	4,061
Total impaired loans	2,554	4,985
Nonaccrual loans, allocated reserves	0	6
Troubled debt restructuring on accrual, allocated reserves	346	754
Total impaired loans, allocated reserves	346	760
Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Loans past due and still accruing	0	0
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	537	724
Loans past due and still accruing	0	0
Troubled debt restructuring on accrual	739	1,299
Total impaired loans	1,276	2,022
Nonaccrual loans, allocated reserves	46	104
Troubled debt restructuring on accrual, allocated reserves	82	222
Total impaired loans, allocated reserves	128	326
Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,597	0
Loans past due and still accruing	0	105
Total impaired loans	1,597	105
Nonaccrual loans, allocated reserves	26	0
Loans past due and still accruing, allocated reserves	0	8
Total impaired loans, allocated reserves	26	8
One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	8,507	12,532
Loans past due and still accruing	2,095	2,611
Troubled debt restructuring on accrual	15,792	23,302
Total impaired loans	26,394	38,445
Nonaccrual loans, allocated reserves	35	250
Loans past due and still accruing, allocated reserves	10	16
Troubled debt restructuring on accrual, allocated reserves	987	1,355
Total impaired loans, allocated reserves	1,032	1,621
Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	838	903
Loans past due and still accruing	80	13
Troubled debt restructuring on accrual	233	360
Total impaired loans	1,151	1,276
Nonaccrual loans, allocated reserves	47	13
Loans past due and still accruing, allocated reserves	0	0
Troubled debt restructuring on accrual, allocated reserves	28	33
Total impaired loans, allocated reserves	75	46
Consumer - other [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	411	269
Loans past due and still accruing	0	131
Troubled debt restructuring on accrual	197	245
Total impaired loans	608	646
Nonaccrual loans, allocated reserves	0	1
Loans past due and still accruing, allocated reserves	0	1
Troubled debt restructuring on accrual, allocated reserves	6	34
Total impaired loans, allocated reserves	$ 6	$ 36