LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Impaired Loans and Related Allowance Reserve) (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	$ 31,117,000	$ 31,361,000
Past due and still accruing	2,289,000	3,029,000
TDRs	54,611,000	57,462,000
Total impaired loans	88,017,000	91,852,000
Nonaccrual loans, allocated reserves	1,590,000	2,256,000
Past due and still accruing, allocated reserves	4,000	62,000
TDRs, allocated reserves	6,825,000	6,020,000
Allocated Reserve	8,419,000	8,338,000
Commitments to advance funds to TDRs	1,800,000	1,800,000
Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	3,558,000	4,105,000
Past due and still accruing	0	0
TDRs	187,000	188,000
Total impaired loans	3,745,000	4,293,000
Nonaccrual loans, allocated reserves	52,000	618,000
TDRs, allocated reserves	4,000	4,000
Allocated Reserve	56,000	621,000
Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	3,169,000	2,474,000
Past due and still accruing	0	0
TDRs	7,020,000	7,034,000
Total impaired loans	10,189,000	9,508,000
Nonaccrual loans, allocated reserves	53,000	56,000
TDRs, allocated reserves	1,026,000	664,000
Allocated Reserve	1,079,000	720,000
Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	339,000	0
Past due and still accruing	0	0
TDRs	7,075,000	7,131,000
Total impaired loans	7,414,000	7,131,000
Nonaccrual loans, allocated reserves	71,000	0
TDRs, allocated reserves	1,775,000	1,665,000
Allocated Reserve	1,846,000	1,665,000
Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Past due and still accruing	0	0
One-to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,951,000	1,565,000
Past due and still accruing	0	0
TDRs	6,551,000	6,726,000
Total impaired loans	8,503,000	8,291,000
Nonaccrual loans, allocated reserves	308,000	326,000
TDRs, allocated reserves	1,007,000	1,115,000
Allocated Reserve	1,315,000	1,441,000
Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,777,000	2,061,000
Past due and still accruing	0	0
TDRs	4,542,000	4,842,000
Total impaired loans	6,319,000	6,904,000
Nonaccrual loans, allocated reserves	233,000	323,000
TDRs, allocated reserves	788,000	667,000
Allocated Reserve	1,022,000	990,000
Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	0	46,000
Past due and still accruing	0	0
Total impaired loans		46,000
Nonaccrual loans, allocated reserves	0	12,000
Allocated Reserve		12,000
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	4,370,000	4,750,000
Past due and still accruing	0	0
TDRs	1,194,000	2,975,000
Total impaired loans	5,564,000	7,725,000
Nonaccrual loans, allocated reserves	341,000	344,000
TDRs, allocated reserves	215,000	610,000
Allocated Reserve	556,000	955,000
Agricultural business/farmland [Member]
Financing Receivable, Impaired [Line Items]
Past due and still accruing	0	0
One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	12,875,000	12,964,000
Past due and still accruing	2,243,000	2,877,000
TDRs	27,013,000	27,540,000
Total impaired loans	42,131,000	43,380,000
Nonaccrual loans, allocated reserves	387,000	520,000
TDRs, allocated reserves	1,916,000	1,228,000
Allocated Reserve	2,305,000	1,806,000
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,240,000	1,323,000
Past due and still accruing	46,000	152,000
TDRs	485,000	488,000
Total impaired loans	1,771,000	1,891,000
Nonaccrual loans, allocated reserves	121,000	16,000
TDRs, allocated reserves	62,000	38,000
Allocated Reserve	184,000	48,000
Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual loans	1,838,000	2,073,000
Past due and still accruing	0	0
TDRs	544,000	538,000
Total impaired loans	2,381,000	2,683,000
Nonaccrual loans, allocated reserves	24,000	41,000
TDRs, allocated reserves	32,000	29,000
Allocated Reserve	$ 56,000	$ 80,000