LOANS - Composition of loans receivable by risk rating grade (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Business Activities Loans - Pass
Residential 1-4 family	$ 288,103	$ 285,939
Residential 5+ multifamily	7,928	5,907
Construction of residential 1-4 family	10,990	10,951
Home equity lines of credit	33,938	34,299
Residential real estate	340,959	337,096
Commercial	166,867	145,849
Construction of commercial	4,239	3,366
Commercial real estate	171,106	149,215
Farm land	3,605	2,912
Vacant land	6,484	6,513
Real estate secured	522,154	495,736
Commercial and industrial	106,007	118,804
Municipal	8,737	8,626
Consumer	5,060	5,288
Loans receivable, gross	641,958	628,454
Business Activities Loans - Special mention
Residential 1-4 family	6,112	6,170
Residential 5+ multifamily	1,849	1,906
Construction of residential 1-4 family
Home equity lines of credit	852	512
Residential real estate	8,813	8,588
Commercial	3,720	3,759
Construction of commercial
Commercial real estate	3,720	3,759
Farm land
Vacant land	83	87
Real estate secured	12,616	12,434
Commercial and industrial	1,286	1,734
Municipal
Consumer	20	24
Loans receivable, gross	13,922	14,192
Business Activities Loans - Substandard
Residential 1-4 family	2,896	2,832
Residential 5+ multifamily	161	163
Construction of residential 1-4 family
Home equity lines of credit	243	676
Residential real estate	3,300	3,671
Commercial	5,731	6,020
Construction of commercial	113	115
Commercial real estate	5,844	6,135
Farm land	994	1,002
Vacant land
Real estate secured	10,138	10,808
Commercial and industrial	198	606
Municipal
Consumer
Loans receivable, gross	10,336	11,414
Business Activities Loans - Doubtful
Residential 1-4 family		89
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate		89
Commercial
Construction of commercial
Commercial real estate
Farm land
Vacant land
Real estate secured		89
Commercial and industrial
Municipal
Consumer
Loans receivable, gross		89
Business Activities Loans - Loss
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate
Commercial
Construction of commercial
Commercial real estate
Farm land
Vacant land
Real estate secured
Commercial and industrial
Municipal
Consumer
Loans receivable, gross
Business Activities Loans - Total
Residential 1-4 family	297,111	295,030
Residential 5+ multifamily	9,938	7,976
Construction of residential 1-4 family	10,990	10,951
Home equity lines of credit	35,033	35,487
Residential real estate	353,072	349,444
Commercial	176,318	155,628
Construction of commercial	4,352	3,481
Commercial real estate	180,670	159,109
Farm land	4,599	3,914
Vacant land	6,567	6,600
Real estate secured	544,908	519,067
Commercial and industrial	107,491	121,144
Municipal	8,737	8,626
Consumer	5,080	5,312
Loans receivable, gross	666,216	654,149
Acquired Loans - Pass
Residential 1-4 family	5,909	5,989
Residential 5+ multifamily	5,526	5,649
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	11,435	11,638
Commercial	64,985	70,007
Construction of commercial	1,598	1,659
Commercial real estate	66,583	71,666
Farm land
Vacant land
Real estate secured	78,018	83,304
Commercial and industrial	16,823	19,110
Municipal
Consumer	61	65
Loans receivable, gross	94,902	102,479
Acquired Loans - Special Mention
Residential 1-4 family	107	109
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	107	109
Commercial	2,590	4,059
Construction of commercial
Commercial real estate	2,590	4,059
Farm land
Vacant land
Real estate secured	2,697	4,168
Commercial and industrial	987	1,160
Municipal
Consumer	2	3
Loans receivable, gross	3,686	5,331
Acquired Loans - Substandard
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate
Commercial	4,733	5,788
Construction of commercial	259	258
Commercial real estate	4,992	6,046
Farm land
Vacant land
Real estate secured	4,992	6,046
Commercial and industrial	59	59
Municipal
Consumer
Loans receivable, gross	5,051	6,105
Acquired Loans - Doubtful
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate
Commercial
Construction of commercial
Commercial real estate
Farm land
Vacant land
Real estate secured
Commercial and industrial
Municipal
Consumer
Loans receivable, gross
Acquired Loans - Loss
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate
Commercial
Construction of commercial
Commercial real estate
Farm land
Vacant land
Real estate secured
Commercial and industrial
Municipal
Consumer
Loans receivable, gross
Acquired Loans - Total
Residential 1-4 family	6,016	6,098
Residential 5+ multifamily	5,526	5,649
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	11,542	11,747
Commercial	72,308	79,854
Construction of commercial	1,857	1,917
Commercial real estate	74,165	81,771
Farm land
Vacant land
Real estate secured	85,707	93,518
Commercial and industrial	17,869	20,329
Municipal
Consumer	63	68
Loans receivable, gross	$ 103,639	$ 113,915