LOANS - Composition of loans receivable and allowance for loan losses (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Business Activities Loans - Collectively evaluated Loans
Residential 1-4 family	$ 280,711	$ 253,156
Residential 5+ multifamily	5,860	4,640
Construction of residential 1-4 family	9,824	7,998
Home equity lines credit	34,674	34,298
Residential real estate	331,069	300,092
Commercial	158,185	125,173
Construction of commercial	3,949	6,403
Commercial real estate	162,134	131,576
Farm land	3,025	2,162
Vacant land	5,589	5,486
Real estate secured	501,817	439,316
Commercial and industrial	101,063	74,131
Municipal	8,475	9,566
Consumer	5,593	6,115
Unallocated allowance
Totals	616,948	529,128
Business Activities Loans - Collectively evaluated Allowance
Residential 1-4 family	1,698	1,415
Residential 5+ multifamily	54	33
Construction of residential 1-4 family	85	65
Home equity lines credit	324	286
Residential real estate	2,161	1,799
Commercial	1,646	1,265
Construction of commercial	48	87
Commercial real estate	1,694	1,352
Farm land	27	23
Vacant land	166	122
Real estate secured	4,048	3,296
Commercial and industrial	853	673
Municipal	53	61
Consumer	94	124
Unallocated allowance	315	482
Totals	5,363	4,636
Business Activities Loans - Individually evaluated Loans
Residential 1-4 family	5,952	8,339
Residential 5+ multifamily	1,830	1,771
Construction of residential 1-4 family
Home equity lines credit	796	719
Residential real estate	8,578	10,829
Commercial	4,417	4,273
Construction of commercial	117	122
Commercial real estate	4,534	4,395
Farm land	1,008	1,031
Vacant land	241	3,077
Real estate secured	14,361	19,332
Commercial and industrial	83	526
Municipal
Consumer		80
Unallocated allowance
Totals	14,444	19,938
Business Activities Loans - Individually evaluated Allowance
Residential 1-4 family	147	610
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines credit	17	68
Residential real estate	164	678
Commercial	69	113
Construction of commercial		1
Commercial real estate	69	114
Farm land	9	14
Vacant land	4	29
Real estate secured	246	835
Commercial and industrial	4	10
Municipal
Consumer
Unallocated allowance
Totals	250	845
Business Activities Loans - Total portfolio Loans
Residential 1-4 family	286,663	261,495
Residential 5+ multifamily	7,690	6,411
Construction of residential 1-4 family	9,824	7,998
Home equity lines credit	35,470	35,017
Residential real estate	339,647	310,921
Commercial	162,602	129,446
Construction of commercial	4,066	6,525
Commercial real estate	166,668	135,971
Farm land	4,033	3,193
Vacant land	5,830	8,563
Real estate secured	516,178	458,648
Commercial and industrial	101,146	74,657
Municipal	8,475	9,566
Consumer	5,593	6,195
Unallocated allowance
Totals	631,392	549,066
Business Activities Loans - Total portfolio Allowance
Residential 1-4 family	1,845	2,025
Residential 5+ multifamily	54	33
Construction of residential 1-4 family	85	65
Home equity lines credit	341	354
Residential real estate	2,325	2,477
Commercial	1,715	1,378
Construction of commercial	48	88
Commercial real estate	1,763	1,466
Farm land	36	37
Vacant land	170	151
Real estate secured	4,294	4,131
Commercial and industrial	857	683
Municipal	53	61
Consumer	94	124
Unallocated allowance	315	482
Totals	5,613	5,481
Acquired Loans - Collectively evaluated Loans
Residential 1-4 family	6,244	7,023
Residential 5+ multifamily	5,741	6,136
Construction of residential 1-4 family
Home equity lines credit
Residential real estate	11,985	13,159
Commercial	74,858	81,300
Construction of commercial	1,881	4,612
Commercial real estate	76,739	85,912
Farm land
Vacant land
Real estate secured	88,724	99,071
Commercial and industrial	29,676	45,650
Municipal
Consumer	52	61
Unallocated allowance
Totals	118,452	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	22	19
Construction of commercial	3	4
Commercial real estate	25	23
Farm land
Vacant land
Real estate secured	25	23
Commercial and industrial	26	24
Municipal
Consumer
Unallocated allowance
Totals	51	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	2,955	2,742
Construction of commercial	258	262
Commercial real estate	3,213	3,004
Farm land
Vacant land
Real estate secured	4,115	3,780
Commercial and industrial
Municipal
Consumer
Unallocated allowance
Totals	4,115	3,780
Acquired Loans - Individually evaluated Allowance
Residential 1-4 family	74	79
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines credit
Residential real estate	74	79
Commercial	82	107
Construction of commercial
Commercial real estate	82	107
Farm land
Vacant land
Real estate secured	156	186
Commercial and industrial
Municipal
Consumer
Unallocated allowance
Totals	156	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	3,928	4,787
Construction of commercial
Commercial real estate	3,928	4,787
Farm land
Vacant land
Real estate secured	3,928	4,787
Commercial and industrial	332	1,114
Municipal
Consumer	16	16
Unallocated allowance
Totals	4,276	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	64	2
Construction of commercial
Commercial real estate	64	2
Farm land
Vacant land
Real estate secured	64	2
Commercial and industrial	9
Municipal
Consumer
Unallocated allowance
Totals	72	2
Acquired Loans - Total portfolio Loans
Residential 1-4 family	7,023	7,799
Residential 5+ multifamily	5,864	6,136
Construction of residential 1-4 family
Home equity lines credit
Residential real estate	12,887	13,935
Commercial	81,741	88,829
Construction of commercial	2,139	4,874
Commercial real estate	83,880	93,703
Farm land
Vacant land
Real estate secured	96,767	107,638
Commercial and industrial	30,008	46,764
Municipal
Consumer	68	77
Unallocated allowance
Totals	126,843	154,479
Acquired Loans - Total portfolio Allowance
Residential 1-4 family	74	79
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines credit
Residential real estate	74	79
Commercial	168	128
Construction of commercial	3	4
Commercial real estate	171	132
Farm land
Vacant land
Real estate secured	245	211
Commercial and industrial	34	24
Municipal
Consumer
Unallocated allowance
Totals	$ 279	$ 235