LOANS - Composition of loans receivable by risk rating grade (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Business Activities Loans - Pass
Residential 1-4 family	$ 291,306	$ 285,939
Residential 5+ multifamily	9,473	5,907
Construction of residential 1-4 family	10,376	10,951
Home equity lines of credit	34,709	34,299
Residential real estate	345,864	337,096
Commercial	165,520	145,849
Construction of commercial	5,458	3,366
Commercial real estate	170,978	149,215
Farm land	3,467	2,912
Vacant land	6,888	6,513
Real estate secured	527,197	495,736
Commercial and industrial	108,798	118,804
Municipal	12,737	8,626
Consumer	4,809	5,288
Loans receivable, gross	653,541	628,454
Business Activities Loans - Special mention
Residential 1-4 family	6,030	6,170
Residential 5+ multifamily	1,841	1,906
Construction of residential 1-4 family
Home equity lines of credit	819	512
Residential real estate	8,690	8,588
Commercial	3,675	3,759
Construction of commercial
Commercial real estate	3,675	3,759
Farm land
Vacant land	81	87
Real estate secured	12,446	12,434
Commercial and industrial	1,337	1,734
Municipal
Consumer	17	24
Loans receivable, gross	13,800	14,192
Business Activities Loans - Substandard
Residential 1-4 family	3,414	2,832
Residential 5+ multifamily	158	163
Construction of residential 1-4 family
Home equity lines of credit	278	676
Residential real estate	3,850	3,671
Commercial	6,274	6,020
Construction of commercial	112	115
Commercial real estate	6,386	6,135
Farm land	986	1,002
Vacant land
Real estate secured	11,222	10,808
Commercial and industrial	289	606
Municipal
Consumer
Loans receivable, gross	11,511	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	300,750	295,030
Residential 5+ multifamily	11,472	7,976
Construction of residential 1-4 family	10,376	10,951
Home equity lines of credit	35,806	35,487
Residential real estate	358,404	349,444
Commercial	175,469	155,628
Construction of commercial	5,570	3,481
Commercial real estate	181,039	159,109
Farm land	4,453	3,914
Vacant land	6,969	6,600
Real estate secured	550,865	519,067
Commercial and industrial	110,424	121,144
Municipal	12,737	8,626
Consumer	4,826	5,312
Loans receivable, gross	678,852	654,149
Acquired Loans - Pass
Residential 1-4 family	5,534	5,989
Residential 5+ multifamily	5,456	5,649
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	10,990	11,638
Commercial	63,060	70,007
Construction of commercial	1,466	1,659
Commercial real estate	64,526	71,666
Farm land
Vacant land
Real estate secured	75,516	83,304
Commercial and industrial	14,247	19,110
Municipal
Consumer	54	65
Loans receivable, gross	89,817	102,479
Acquired Loans - Special Mention
Residential 1-4 family	105	109
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	105	109
Commercial	2,539	4,059
Construction of commercial
Commercial real estate	2,539	4,059
Farm land
Vacant land
Real estate secured	2,644	4,168
Commercial and industrial	915	1,160
Municipal
Consumer	2	3
Loans receivable, gross	3,561	5,331
Acquired Loans - Substandard
Residential 1-4 family	48
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	48
Commercial	4,547	5,788
Construction of commercial	258	258
Commercial real estate	4,805	6,046
Farm land
Vacant land
Real estate secured	4,853	6,046
Commercial and industrial	58	59
Municipal
Consumer
Loans receivable, gross	4,911	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	2
Municipal
Consumer
Loans receivable, gross	2
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	5,687	6,098
Residential 5+ multifamily	5,456	5,649
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	11,143	11,747
Commercial	70,146	79,854
Construction of commercial	1,724	1,917
Commercial real estate	71,870	81,771
Farm land
Vacant land
Real estate secured	83,013	93,518
Commercial and industrial	15,222	20,329
Municipal
Consumer	56	68
Loans receivable, gross	$ 98,291	$ 113,915