LOANS - Composition of loans receivable and allowance for loan losses (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Business Activities Loans - Collectively evaluated Loans
Residential 1-4 family	$ 252,454	$ 245,997
Residential 5+ multifamily	4,315	4,536
Construction of residential 1-4 family	6,193	2,004
Home equity credit	33,230	34,231
Residential real estate	296,192	286,768
Commercial	106,573	93,784
Construction of commercial	12,864	18,474
Commercial real estate	119,437	112,258
Farm land	2,449	2,855
Vacant land	6,364	6,245
Real estate secured	424,442	408,126
Commercial and industrial	70,372	48,635
Municipal	6,947	6,083
Consumer	$ 5,760	$ 4,334
Unallocated allowance
Totals	$ 507,521	$ 467,178
Business Activities Loans - Collectively evaluated Allowance
Residential 1-4 family	1,603	1,316
Residential 5+ multifamily	37	66
Construction of residential 1-4 family	52	13
Home equity credit	345	350
Residential real estate	2,037	1,745
Commercial	937	1,018
Construction of commercial	120	193
Commercial real estate	1,057	1,211
Farm land	19	59
Vacant land	234	67
Real estate secured	3,347	3,082
Commercial and industrial	494	532
Municipal	48	61
Consumer	113	$ 117
Unallocated allowance	424
Totals	4,426	$ 3,792
Business Activities Loans - Individually evaluated Loans
Residential 1-4 family	8,458	6,261
Residential 5+ multifamily	$ 1,877	$ 1,020
Construction of residential 1-4 family
Home equity credit	$ 650	$ 396
Residential real estate	10,985	7,677
Commercial	4,382	4,714
Construction of commercial	123	128
Commercial real estate	4,505	4,842
Farm land	1,036	384
Vacant land	3,082	3,097
Real estate secured	19,608	16,000
Commercial and industrial	$ 486	$ 569
Municipal
Consumer
Unallocated allowance
Totals	$ 20,094	$ 16,569
Business Activities Loans - Individually evaluated Allowance
Residential 1-4 family	$ 724	549
Residential 5+ multifamily		$ 3
Construction of residential 1-4 family
Home equity credit	$ 37	$ 9
Residential real estate	761	561
Commercial	$ 170	$ 486
Construction of commercial
Commercial real estate	$ 170	$ 486
Farm land	1
Vacant land	24	$ 38
Real estate secured	956	1,085
Commercial and industrial	$ 4	$ 51
Municipal
Consumer
Unallocated allowance
Totals	$ 960	$ 1,136
Business Activities Loans - Total portfolio Loans
Residential 1-4 family	260,912	252,258
Residential 5+ multifamily	6,192	5,556
Construction of residential 1-4 family	6,193	2,004
Home equity credit	33,880	34,627
Residential real estate	307,177	294,445
Commercial	110,955	98,498
Construction of commercial	12,987	18,602
Commercial real estate	123,942	117,100
Farm land	3,485	3,239
Vacant land	9,446	9,342
Real estate secured	444,050	424,126
Commercial and industrial	70,858	49,204
Municipal	6,947	6,083
Consumer	$ 5,760	$ 4,334
Unallocated allowance
Totals	$ 527,615	$ 483,747
Business Activities Loans - Total portfolio Allowance
Residential 1-4 family	2,327	1,865
Residential 5+ multifamily	37	69
Construction of residential 1-4 family	52	13
Home equity credit	382	359
Residential real estate	2,798	2,306
Commercial	1,107	1,504
Construction of commercial	120	193
Commercial real estate	1,227	1,697
Farm land	20	59
Vacant land	258	105
Real estate secured	4,303	4,167
Commercial and industrial	498	583
Municipal	48	61
Consumer	113	117
Unallocated allowance	424	409
Totals	5,386	5,337
Acquired Loans - Collectively evaluated Loans
Residential 1-4 family	7,259	8,661
Residential 5+ multifamily	$ 6,228	$ 8,735
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 13,487	$ 17,396
Commercial	83,257	89,820
Construction of commercial	4,590	9,045
Commercial real estate	$ 87,847	$ 98,865
Farm land
Vacant land
Real estate secured	$ 101,334	$ 116,261
Commercial and industrial	$ 52,587	$ 66,874
Municipal
Consumer	$ 57	$ 103
Unallocated allowance
Totals	$ 153,978	$ 183,238
Acquired Loans - Collectively evaluated Allowance
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate
Commercial	$ 13
Construction of commercial	3	$ 7
Commercial real estate	$ 16	$ 7
Farm land
Vacant land
Real estate secured	$ 16	$ 7
Commercial and industrial	$ 40	$ 14
Municipal
Consumer
Unallocated allowance
Totals	$ 56	$ 21
Acquired Loans - Individually evaluated Loans
Residential 1-4 family	$ 767	$ 562
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 767	$ 562
Commercial	2,920	$ 2,502
Construction of commercial	272
Commercial real estate	$ 3,192	$ 2,502
Farm land
Vacant land
Real estate secured	$ 3,959	$ 3,064
Commercial and industrial	$ 40
Municipal
Consumer
Unallocated allowance
Totals	$ 3,999	$ 3,064
Acquired Loans - Individually evaluated Allowance
Residential 1-4 family	$ 70
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 70
Commercial	$ 145
Construction of commercial
Commercial real estate	$ 145
Farm land
Vacant land
Real estate secured	$ 215
Commercial and industrial
Municipal
Consumer
Unallocated allowance
Totals	$ 215
Acquired Loans - ASC 310-30 Loans
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate
Commercial	$ 5,290	$ 5,577
Construction of commercial
Commercial real estate	$ 5,290	$ 5,577
Farm land
Vacant land
Real estate secured	$ 5,290	$ 5,577
Commercial and industrial	$ 1,301	$ 1,840
Municipal
Consumer	$ 17	$ 19
Unallocated allowance
Totals	$ 6,608	$ 7,436
Acquired Loans - ASC 310-30 loans Allowance
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate
Commercial	$ 2
Construction of commercial
Commercial real estate	$ 2
Farm land
Vacant land
Real estate secured	$ 2
Commercial and industrial
Municipal
Consumer
Unallocated allowance
Totals	$ 2
Acquired Loans - Total portfolio Loans
Residential 1-4 family	8,026	$ 9,223
Residential 5+ multifamily	$ 6,228	$ 8,735
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 14,254	$ 17,958
Commercial	91,467	97,899
Construction of commercial	4,862	9,045
Commercial real estate	$ 96,329	$ 106,944
Farm land
Vacant land
Real estate secured	$ 110,583	$ 124,902
Commercial and industrial	$ 53,928	$ 68,714
Municipal
Consumer	$ 74	$ 122
Unallocated allowance
Totals	$ 164,585	$ 193,738
Acquired Loans - Total portfolio Allowance
Residential 1-4 family	$ 70
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 70
Commercial	160
Construction of commercial	3	$ 7
Commercial real estate	$ 163	$ 7
Farm land
Vacant land
Real estate secured	$ 233	$ 7
Commercial and industrial	$ 40	$ 14
Municipal
Consumer
Unallocated allowance
Totals	$ 273	$ 21