SECURITIES - Composition of securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Available-for-sale
Total securities available-for-sale	$ 106,610	$ 126,287
Amortized cost (1)
Available-for-sale
U.S. Government Agency notes	2,511	7,515
Municipal bonds	44,066	45,395
Mortgage backed securities, U.S. Government Agencies	39,528	47,465
Collateralized mortgage obligations, U.S. Government Agencies	4,220	5,131
Collateralized mortgage obligations, Non-agency	9,449	11,081
SBA bonds	2,418	2,781
Preferred Stock	20	20
Total securities available-for-sale	104,708	121,884
U.S. Treasury notes	2,496	2,496
Federal Home Loan Bank of Boston stock	5,340	5,747
Gross un-realized gains
Available-for-sale
U.S. Government Agency notes	154	211
Municipal bonds	1,082	2,138
Mortgage backed securities, U.S. Government Agencies	622	1,284
Collateralized mortgage obligations, U.S. Government Agencies	54	66
Collateralized mortgage obligations, Non-agency	485	494
SBA bonds	102	82
Preferred Stock	468	147
Total securities available-for-sale	3,154	4,659
U.S. Treasury notes	187	237
Federal Home Loan Bank of Boston stock
Gross un-realized losses
Available-for-sale
U.S. Government Agency notes
Municipal bonds	(1,183)	(168)
Mortgage backed securities, U.S. Government Agencies	(48)	(20)
Collateralized mortgage obligations, U.S. Government Agencies
Collateralized mortgage obligations, Non-agency	(21)	(68)
SBA bonds
Preferred Stock
Total securities available-for-sale	(1,252)	(256)
U.S. Treasury notes
Federal Home Loan Bank of Boston stock
Fair value
Available-for-sale
U.S. Government Agency notes	2,665	7,726
Municipal bonds	43,965	47,365
Mortgage backed securities, U.S. Government Agencies	40,102	48,729
Collateralized mortgage obligations, U.S. Government Agencies	4,274	5,197
Collateralized mortgage obligations, Non-agency	9,913	11,507
SBA bonds	2,520	2,863
Preferred Stock	488	167
Total securities available-for-sale	106,610	126,287
U.S. Treasury notes	2,683	2,733
Federal Home Loan Bank of Boston stock	$ 5,340	$ 5,747