LOANS AND ALLOWANCE - principal balances and specific valuation allocations for impaired loans (Details 6) (Loans Receivable, USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans without a specific allowance: Recorded Investment	$ 11,278	$ 11,352
Impaired loans without a specific allowance: Unpaid Principal Balance	13,306	12,330
Impaired loans with a specific allowance: Recorded Investment	3,977	5,910
Impaired loans with a specific allowance: Unpaid Principal Balance	4,122	5,910
Impaired loans with a specific allowance: Specific Allowance	620	1,432
Total impaired loans, recorded investment	15,255	17,262
Total impaired loans, unpaid principal balance	17,428	18,240
Total impaired loans, specific allowance	620	1,432
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans without a specific allowance: Recorded Investment	121
Impaired loans without a specific allowance: Unpaid Principal Balance	212
Impaired loans with a specific allowance: Recorded Investment
Impaired loans with a specific allowance: Unpaid Principal Balance
Impaired loans with a specific allowance: Specific Allowance
Total impaired loans, recorded investment	121
Total impaired loans, unpaid principal balance	212
Total impaired loans, specific allowance
One-to-four family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans without a specific allowance: Recorded Investment	4,234	3,064
Impaired loans without a specific allowance: Unpaid Principal Balance	4,544	3,249
Impaired loans with a specific allowance: Recorded Investment	942	3,267
Impaired loans with a specific allowance: Unpaid Principal Balance	942	3,267
Impaired loans with a specific allowance: Specific Allowance	184	913
Total impaired loans, recorded investment	5,176	6,331
Total impaired loans, unpaid principal balance	5,486	6,516
Total impaired loans, specific allowance	184	913
Multi-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans without a specific allowance: Recorded Investment	55	1,966
Impaired loans without a specific allowance: Unpaid Principal Balance	55	1,966
Impaired loans with a specific allowance: Recorded Investment	1,063
Impaired loans with a specific allowance: Unpaid Principal Balance	1,063
Impaired loans with a specific allowance: Specific Allowance	195
Total impaired loans, recorded investment	1,118	1,966
Total impaired loans, unpaid principal balance	1,118	1,966
Total impaired loans, specific allowance	195
Nonresidential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans without a specific allowance: Recorded Investment	3,738	3,705
Impaired loans without a specific allowance: Unpaid Principal Balance	4,867	4,469
Impaired loans with a specific allowance: Recorded Investment	86
Impaired loans with a specific allowance: Unpaid Principal Balance	231
Impaired loans with a specific allowance: Specific Allowance	45
Total impaired loans, recorded investment	3,824	3,705
Total impaired loans, unpaid principal balance	5,098	4,469
Total impaired loans, specific allowance	45
Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans without a specific allowance: Recorded Investment	2,543	2,329
Impaired loans without a specific allowance: Unpaid Principal Balance	2,963	2,329
Impaired loans with a specific allowance: Recorded Investment	1,886	2,643
Impaired loans with a specific allowance: Unpaid Principal Balance	1,886	2,643
Impaired loans with a specific allowance: Specific Allowance	196	519
Total impaired loans, recorded investment	4,429	4,972
Total impaired loans, unpaid principal balance	4,849	4,972
Total impaired loans, specific allowance	196	519
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans without a specific allowance: Recorded Investment	573	271
Impaired loans without a specific allowance: Unpaid Principal Balance	651	300
Impaired loans with a specific allowance: Recorded Investment
Impaired loans with a specific allowance: Unpaid Principal Balance
Impaired loans with a specific allowance: Specific Allowance
Total impaired loans, recorded investment	573	271
Total impaired loans, unpaid principal balance	651	300
Total impaired loans, specific allowance
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans without a specific allowance: Recorded Investment	14	17
Impaired loans without a specific allowance: Unpaid Principal Balance	14	17
Impaired loans with a specific allowance: Recorded Investment
Impaired loans with a specific allowance: Unpaid Principal Balance
Impaired loans with a specific allowance: Specific Allowance
Total impaired loans, recorded investment	14	17
Total impaired loans, unpaid principal balance	14	17
Total impaired loans, specific allowance