LOANS - Composition of loans receivable and allowance for loan losses (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Business Activities Loans - Collectively evaluated Loans
Residential 1-4 family	$ 266,482	$ 253,156
Residential 5+ multifamily	6,330	4,640
Construction of residential 1-4 family	9,332	7,998
Home equity lines credit	33,511	34,298
Residential real estate	315,655	300,092
Commercial	132,084	125,173
Construction of commercial	10,025	6,403
Commercial real estate	142,109	131,576
Farm land	2,983	2,162
Vacant land	5,125	5,486
Real estate secured	465,872	439,316
Commercial and industrial	92,019	74,131
Municipal	9,364	9,566
Consumer	$ 5,806	$ 6,115
Unallocated allowance
Totals	$ 573,061	$ 529,128
Business Activities Loans - Collectively evaluated Allowance
Residential 1-4 family	1,534	1,415
Residential 5+ multifamily	45	33
Construction of residential 1-4 family	75	65
Home equity lines credit	309	286
Residential real estate	1,963	1,799
Commercial	1,377	1,265
Construction of commercial	127	87
Commercial real estate	1,504	1,352
Farm land	24	23
Vacant land	120	122
Real estate secured	3,611	3,296
Commercial and industrial	780	673
Municipal	59	61
Consumer	114	124
Unallocated allowance	412	482
Totals	4,976	4,636
Business Activities Loans - Individually evaluated Loans
Residential 1-4 family	8,399	8,339
Residential 5+ multifamily	$ 1,765	$ 1,771
Construction of residential 1-4 family
Home equity lines credit	$ 818	$ 719
Residential real estate	10,982	10,829
Commercial	4,231	4,273
Construction of commercial	120	122
Commercial real estate	4,351	4,395
Farm land	1,024	1,031
Vacant land	3,073	3,077
Real estate secured	19,430	19,332
Commercial and industrial	$ 509	$ 526
Municipal
Consumer		$ 80
Unallocated allowance
Totals	$ 19,939	$ 19,938
Business Activities Loans - Individually evaluated Allowance
Residential 1-4 family	$ 474	$ 610
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines credit	$ 21	$ 68
Residential real estate	495	678
Commercial	80	113
Construction of commercial	1	1
Commercial real estate	81	114
Farm land	1	14
Vacant land	19	29
Real estate secured	596	835
Commercial and industrial	$ 1	$ 10
Municipal
Consumer
Unallocated allowance
Totals	$ 597	$ 845
Business Activities Loans - Total portfolio Loans
Residential 1-4 family	274,881	261,495
Residential 5+ multifamily	8,095	6,411
Construction of residential 1-4 family	9,332	7,998
Home equity lines credit	34,329	35,017
Residential real estate	326,637	310,921
Commercial	136,315	129,446
Construction of commercial	10,145	6,525
Commercial real estate	146,460	135,971
Farm land	4,007	3,193
Vacant land	8,198	8,563
Real estate secured	485,302	458,648
Commercial and industrial	92,528	74,657
Municipal	9,364	9,566
Consumer	$ 5,806	$ 6,195
Unallocated allowance
Totals	$ 593,000	$ 549,066
Business Activities Loans - Total portfolio Allowance
Residential 1-4 family	2,008	2,025
Residential 5+ multifamily	45	33
Construction of residential 1-4 family	75	65
Home equity lines credit	330	354
Residential real estate	2,458	2,477
Commercial	1,457	1,378
Construction of commercial	128	88
Commercial real estate	1,585	1,466
Farm land	25	37
Vacant land	139	151
Real estate secured	4,207	4,131
Commercial and industrial	781	683
Municipal	59	61
Consumer	114	124
Unallocated allowance	412	482
Totals	5,573	5,481
Acquired Loans - Collectively evaluated Loans
Residential 1-4 family	6,664	7,023
Residential 5+ multifamily	$ 5,927	$ 6,136
Construction of residential 1-4 family
Home equity lines credit
Residential real estate	$ 12,591	$ 13,159
Commercial	79,134	81,300
Construction of commercial	4,645	4,612
Commercial real estate	$ 83,779	$ 85,912
Farm land
Vacant land
Real estate secured	$ 96,370	$ 99,071
Commercial and industrial	$ 34,475	$ 45,650
Municipal
Consumer	$ 60	$ 61
Unallocated allowance
Totals	$ 130,905	$ 144,782
Acquired Loans - Collectively evaluated Allowance
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines credit
Residential real estate
Commercial	$ 19	$ 19
Construction of commercial	4	4
Commercial real estate	$ 23	$ 23
Farm land
Vacant land
Real estate secured	$ 23	$ 23
Commercial and industrial	$ 21	$ 24
Municipal
Consumer
Unallocated allowance
Totals	$ 44	$ 47
Acquired Loans - Individually evaluated Loans
Residential 1-4 family	779	$ 776
Residential 5+ multifamily	$ 123
Construction of residential 1-4 family
Home equity lines credit
Residential real estate	$ 902	$ 776
Commercial	2,585	2,742
Construction of commercial	258	262
Commercial real estate	$ 2,843	$ 3,004
Farm land
Vacant land
Real estate secured	$ 3,745	$ 3,780
Commercial and industrial	$ 414
Municipal
Consumer
Unallocated allowance
Totals	$ 4,159	$ 3,780
Acquired Loans - Individually evaluated Allowance
Residential 1-4 family	$ 69	$ 79
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines credit
Residential real estate	$ 69	$ 79
Commercial	$ 27	$ 107
Construction of commercial
Commercial real estate	$ 27	$ 107
Farm land
Vacant land
Real estate secured	$ 96	$ 186
Commercial and industrial	$ 114
Municipal
Consumer
Unallocated allowance
Totals	$ 210	$ 186
Acquired Loans - ASC 310-30 Loans
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines credit
Residential real estate
Commercial	$ 4,781	$ 4,787
Construction of commercial
Commercial real estate	$ 4,781	$ 4,787
Farm land
Vacant land
Real estate secured	$ 4,781	$ 4,787
Commercial and industrial	$ 628	$ 1,114
Municipal
Consumer	$ 16	$ 16
Unallocated allowance
Totals	$ 5,425	$ 5,917
Acquired Loans - ASC 310-30 loans Allowance
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines credit
Residential real estate
Commercial	$ 44	$ 2
Construction of commercial
Commercial real estate	$ 44	$ 2
Farm land
Vacant land
Real estate secured	$ 44	$ 2
Commercial and industrial	$ 6
Municipal
Consumer
Unallocated allowance
Totals	$ 50	$ 2
Acquired Loans - Total portfolio Loans
Residential 1-4 family	7,443	7,799
Residential 5+ multifamily	$ 6,050	$ 6,136
Construction of residential 1-4 family
Home equity lines credit
Residential real estate	$ 13,493	$ 13,935
Commercial	86,500	88,829
Construction of commercial	4,903	4,874
Commercial real estate	$ 91,403	$ 93,703
Farm land
Vacant land
Real estate secured	$ 104,896	$ 107,638
Commercial and industrial	$ 35,517	$ 46,764
Municipal
Consumer	$ 76	$ 77
Unallocated allowance
Totals	$ 140,489	$ 154,479
Acquired Loans - Total portfolio Allowance
Residential 1-4 family	$ 69	$ 79
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines credit
Residential real estate	$ 69	$ 79
Commercial	90	128
Construction of commercial	4	4
Commercial real estate	$ 94	$ 132
Farm land
Vacant land
Real estate secured	$ 163	$ 211
Commercial and industrial	$ 141	$ 24
Municipal
Consumer
Unallocated allowance
Totals	$ 304	$ 235