LOANS - Composition of loans receivable by risk rating grade (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Business Activities Loans - Pass
Residential 1-4 family	$ 285,939	$ 248,027
Residential 5+ multifamily	5,907	4,507
Construction of residential 1-4 family	10,951	7,111
Home equity lines of credit	34,299	33,687
Residential real estate	337,096	293,332
Commercial	145,849	120,903
Construction of commercial	3,366	6,525
Commercial real estate	149,215	127,428
Farm land	2,912	2,162
Vacant land	6,513	5,567
Real estate secured	495,736	428,489
Commercial and industrial	118,804	72,887
Municipal	8,626	9,566
Consumer	5,288	6,171
Loans receivable, gross	628,454	517,113
Business Activities Loans - Special mention
Residential 1-4 family	6,170	6,933
Residential 5+ multifamily	1,906	1,815
Construction of residential 1-4 family		887
Home equity lines of credit	512	545
Residential real estate	8,588	10,180
Commercial	3,759	4,801
Construction of commercial
Commercial real estate	3,759	4,801
Farm land
Vacant land	87	69
Real estate secured	12,434	15,050
Commercial and industrial	1,734	1,214
Municipal
Consumer	24	18
Loans receivable, gross	14,192	16,282
Business Activities Loans - Substandard
Residential 1-4 family	2,832	6,444
Residential 5+ multifamily	163	89
Construction of residential 1-4 family
Home equity lines of credit	676	785
Residential real estate	3,671	7,318
Commercial	6,020	3,742
Construction of commercial	115
Commercial real estate	6,135	3,742
Farm land	1,002	1,031
Vacant land		2,927
Real estate secured	10,808	15,018
Commercial and industrial	606	555
Municipal
Consumer		6
Loans receivable, gross	11,414	15,579
Business Activities Loans - Doubtful
Residential 1-4 family	89	91
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	89	91
Commercial
Construction of commercial
Commercial real estate
Farm land
Vacant land
Real estate secured	89	91
Commercial and industrial		1
Municipal
Consumer
Loans receivable, gross	89	92
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	295,030	261,495
Residential 5+ multifamily	7,976	6,411
Construction of residential 1-4 family	10,951	7,998
Home equity lines of credit	35,487	35,017
Residential real estate	349,444	310,921
Commercial	155,628	129,446
Construction of commercial	3,481	6,525
Commercial real estate	159,109	135,971
Farm land	3,914	3,193
Vacant land	6,600	8,563
Real estate secured	519,067	458,648
Commercial and industrial	121,144	74,657
Municipal	8,626	9,566
Consumer	5,312	6,195
Loans receivable, gross	654,149	549,066
Acquired Loans - Pass
Residential 1-4 family	5,989	6,824
Residential 5+ multifamily	5,649	6,136
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	11,638	12,960
Commercial	70,007	80,406
Construction of commercial	1,659	4,612
Commercial real estate	71,666	85,018
Farm land
Vacant land
Real estate secured	83,304	97,978
Commercial and industrial	19,110	45,363
Municipal
Consumer	65	71
Loans receivable, gross	102,479	143,412
Acquired Loans - Special Mention
Residential 1-4 family	109	199
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	109	199
Commercial	4,059	4,005
Construction of commercial
Commercial real estate	4,059	4,005
Farm land
Vacant land
Real estate secured	4,168	4,204
Commercial and industrial	1,160	875
Municipal
Consumer	3	6
Loans receivable, gross	5,331	5,085
Acquired Loans - Substandard
Residential 1-4 family		776
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate		776
Commercial	5,788	4,418
Construction of commercial	258	262
Commercial real estate	6,046	4,680
Farm land
Vacant land
Real estate secured	6,046	5,456
Commercial and industrial	59	443
Municipal
Consumer
Loans receivable, gross	6,105	5,899
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		83
Municipal
Consumer
Loans receivable, gross		83
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	6,098	7,799
Residential 5+ multifamily	5,649	6,136
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	11,747	13,935
Commercial	79,854	88,829
Construction of commercial	1,917	4,874
Commercial real estate	81,771	93,703
Farm land
Vacant land
Real estate secured	93,518	107,638
Commercial and industrial	20,329	46,764
Municipal
Consumer	68	77
Loans receivable, gross	$ 113,915	$ 154,479