LOANS - Composition of loans receivable and allowance for loan losses (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Business Activities Loans - Collectively evaluated Loans
Residential 1-4 family	$ 250,103	$ 245,997
Residential 5+ multifamily	3,871	4,536
Construction of residential 1-4 family	4,534	2,004
Home equity credit	33,319	34,231
Residential real estate	291,827	286,768
Commercial	99,156	93,784
Construction of commercial	14,868	18,474
Commercial real estate	114,024	112,258
Farm land	2,081	2,855
Vacant land	5,190	6,245
Real estate secured	413,122	408,126
Commercial and industrial	62,994	48,635
Municipal	6,519	6,083
Consumer	$ 5,703	$ 4,334
Unallocated allowance
Totals	$ 488,338	$ 467,178
Business Activities Loans - Collectively evaluated Allowance
Residential 1-4 family	1,079	1,316
Residential 5+ multifamily	17	66
Construction of residential 1-4 family	31	13
Home equity credit	303	350
Residential real estate	1,430	1,745
Commercial	1,054	1,018
Construction of commercial	164	193
Commercial real estate	1,218	1,211
Farm land	19	59
Vacant land	55	67
Real estate secured	2,722	3,082
Commercial and industrial	664	532
Municipal	64	61
Consumer	$ 123	$ 117
Unallocated allowance
Totals	$ 3,573	$ 3,792
Business Activities Loans - Individually evaluated Loans
Residential 1-4 family	8,079	6,261
Residential 5+ multifamily	$ 1,882	$ 1,020
Construction of residential 1-4 family
Home equity credit	$ 714	$ 396
Residential real estate	10,675	7,677
Commercial	4,317	4,714
Construction of commercial	125	128
Commercial real estate	4,442	4,842
Farm land	1,106	384
Vacant land	3,088	3,097
Real estate secured	19,311	16,000
Commercial and industrial	$ 510	$ 569
Municipal
Consumer
Unallocated allowance
Totals	$ 19,821	$ 16,569
Business Activities Loans - Individually evaluated Allowance
Residential 1-4 family	677	549
Residential 5+ multifamily	$ 3	$ 3
Construction of residential 1-4 family
Home equity credit	$ 37	$ 9
Residential real estate	717	561
Commercial	$ 96	$ 486
Construction of commercial
Commercial real estate	$ 96	$ 486
Farm land	73
Vacant land	60	$ 38
Real estate secured	946	1,085
Commercial and industrial	$ 27	$ 51
Municipal
Consumer
Unallocated allowance
Totals	$ 973	$ 1,136
Business Activities Loans - Total portfolio Loans
Residential 1-4 family	258,182	252,258
Residential 5+ multifamily	5,753	5,556
Construction of residential 1-4 family	4,534	2,004
Home equity credit	34,033	34,627
Residential real estate	302,502	294,445
Commercial	103,473	98,498
Construction of commercial	14,993	18,602
Commercial real estate	118,466	117,100
Farm land	3,187	3,239
Vacant land	8,278	9,342
Real estate secured	432,433	424,126
Commercial and industrial	63,504	49,204
Municipal	6,519	6,083
Consumer	$ 5,703	$ 4,334
Unallocated allowance
Totals	$ 508,159	$ 483,747
Business Activities Loans - Total portfolio Allowance
Residential 1-4 family	1,756	1,865
Residential 5+ multifamily	20	69
Construction of residential 1-4 family	31	13
Home equity credit	340	359
Residential real estate	2,147	2,306
Commercial	1,150	1,504
Construction of commercial	164	193
Commercial real estate	1,314	1,697
Farm land	92	59
Vacant land	115	105
Real estate secured	3,668	4,167
Commercial and industrial	691	583
Municipal	64	61
Consumer	123	117
Unallocated allowance	369	409
Totals	4,915	5,337
Acquired Loans - Collectively evaluated Loans
Residential 1-4 family	8,845	8,661
Residential 5+ multifamily	$ 6,320	$ 8,735
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 15,165	$ 17,396
Commercial	83,626	89,820
Construction of commercial	7,728	9,045
Commercial real estate	$ 91,354	$ 98,865
Farm land
Vacant land
Real estate secured	$ 106,519	$ 116,261
Commercial and industrial	$ 56,210	$ 66,874
Municipal
Consumer	$ 84	$ 103
Unallocated allowance
Totals	$ 162,813	$ 183,238
Acquired Loans - Collectively evaluated Allowance
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate
Commercial	$ 2
Construction of commercial	15	$ 7
Commercial real estate	$ 17	$ 7
Farm land
Vacant land
Real estate secured	$ 17	$ 7
Commercial and industrial	$ 52	$ 14
Municipal
Consumer
Unallocated allowance
Totals	$ 69	$ 21
Acquired Loans - Individually evaluated Loans
Residential 1-4 family	$ 581	$ 562
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 581	$ 562
Commercial	2,858	$ 2,502
Construction of commercial	276
Commercial real estate	$ 3,134	$ 2,502
Farm land
Vacant land
Real estate secured	$ 3,715	$ 3,064
Commercial and industrial
Municipal
Consumer
Unallocated allowance
Totals	$ 3,715	$ 3,064
Acquired Loans - Individually evaluated Allowance
Residential 1-4 family	$ 15
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 15
Commercial	$ 60
Construction of commercial
Commercial real estate	$ 60
Farm land
Vacant land
Real estate secured	$ 75
Commercial and industrial
Municipal
Consumer
Unallocated allowance
Totals	$ 75
Acquired Loans - ASC 310-30 Loans
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate
Commercial	$ 5,337	$ 5,577
Construction of commercial
Commercial real estate	$ 5,337	$ 5,577
Farm land
Vacant land
Real estate secured	$ 5,337	$ 5,577
Commercial and industrial	$ 1,527	$ 1,840
Municipal
Consumer	$ 18	$ 19
Unallocated allowance
Totals	$ 6,882	$ 7,436
Acquired Loans - ASC 310-30 loans Allowance
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate
Commercial
Construction of commercial
Commercial real estate
Farm land
Vacant land
Real estate secured
Commercial and industrial
Municipal
Consumer
Unallocated allowance
Totals
Acquired Loans - Total portfolio Loans
Residential 1-4 family	$ 9,426	$ 9,223
Residential 5+ multifamily	$ 6,320	$ 8,735
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 15,746	$ 17,958
Commercial	91,821	97,899
Construction of commercial	8,004	9,045
Commercial real estate	$ 99,825	$ 106,944
Farm land
Vacant land
Real estate secured	$ 115,571	$ 124,902
Commercial and industrial	$ 57,737	$ 68,714
Municipal
Consumer	$ 102	$ 122
Unallocated allowance
Totals	$ 173,410	$ 193,738
Acquired Loans - Total portfolio Allowance
Residential 1-4 family	$ 15
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity credit
Residential real estate	$ 15
Commercial	62
Construction of commercial	15	$ 7
Commercial real estate	$ 77	$ 7
Farm land
Vacant land
Real estate secured	$ 92	$ 7
Commercial and industrial	$ 52	$ 14
Municipal
Consumer
Unallocated allowance
Totals	$ 144	$ 21