LOANS - Composition of loans receivable and the allowance for loan losses (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Collectively evaluated, Loans
Residential 1-4 family	$ 202,490	$ 191,886
Residential 5+ multifamily	3,743	2,913
Construction of residential 1-4 family	1,395	2,379
Home equity credit	33,741	33,697
Residential real estate	241,369	230,875
Commercial	91,276	81,635
Construction of commercial	9,734	5,802
Commercial real estate	101,010	87,437
Farm land	4,282	4,320
Vacant land	4,773	5,795
Real estate secured	351,434	328,427
Commercial and industrial	32,952	37,073
Municipal	3,995	3,378
Consumer	3,898	4,061
Unallocated allowance
Totals	392,279	372,939
Collectively evaluated, Allowance
Residential 1-4 family	794	743
Residential 5+ multifamily	21	22
Construction of residential 1-4 family	6	10
Home equity credit	424	365
Residential real estate	1,245	1,140
Commercial	1,045	931
Construction of commercial	104	64
Commercial real estate	1,149	995
Farm land	68	66
Vacant land	58	70
Real estate secured	2,520	2,271
Commercial and industrial	426	467
Municipal	40	36
Consumer	36	39
Unallocated allowance
Totals	3,022	2,813
Individually evaluated, Loans
Residential 1-4 family	6,669	6,666
Residential 5+ multifamily	971	976
Construction of residential 1-4 family
Home equity credit	184	465
Residential real estate	7,824	8,107
Commercial	5,559	5,747
Construction of commercial	21	21
Commercial real estate	5,580	5,768
Farm land
Vacant land	3,125	4,131
Real estate secured	16,529	18,006
Commercial and industrial	991	1,021
Municipal
Consumer	77	120
Unallocated allowance
Totals	17,597	19,147
Individually evaluated, Allowance
Residential 1-4 family	643	652
Residential 5+ multifamily	50	50
Construction of residential 1-4 family
Home equity credit	1	92
Residential real estate	694	794
Commercial	88	64
Construction of commercial
Commercial real estate	88	64
Farm land
Vacant land	402	164
Real estate secured	1,184	1,022
Commercial and industrial	29	32
Municipal
Consumer	30	53
Unallocated allowance
Totals	1,243	1,107
Total portfolio, Loans
Residential 1-4 family	209,159	198,552
Residential 5+ multifamily	4,714	3,889
Construction of residential 1-4 family	1,395	2,379
Home equity credit	33,925	34,162
Residential real estate	249,193	238,982
Commercial	96,835	87,382
Construction of commercial	9,755	5,823
Commercial real estate	106,590	93,205
Farm land	4,282	4,320
Vacant land	7,897	9,926
Real estate secured	367,962	346,433
Commercial and industrial	33,943	38,094
Municipal	3,995	3,378
Consumer	3,975	4,181
Unallocated allowance
Totals	409,876	392,086
Total portfolio, Allowance
Residential 1-4 family	1,437	1,395
Residential 5+ multifamily	71	72
Construction of residential 1-4 family	6	10
Home equity credit	425	457
Residential real estate	1,939	1,934
Commercial	1,133	995
Construction of commercial	104	64
Commercial real estate	1,237	1,059
Farm land	68	66
Vacant land	460	234
Real estate secured	3,704	3,293
Commercial and industrial	455	499
Municipal	40	36
Consumer	66	92
Unallocated allowance	421	440
Totals	$ 4,686	$ 4,360