SECURITIES - Composition of securities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Available-for-sale
Total securities available-for-sale	$ 126,287	$ 155,794
Amortized cost (1)
Available-for-sale
U.S. Treasury notes	2,496	5,000
U.S. Government Agency notes		14,544
Municipal bonds	45,395	50,881
Mortgage backed securities, U.S. Government Agencies	47,465	57,193
Collateralized mortgage obligations, U.S. Government Agencies	5,131	7,077
Non-agency	11,081	14,300
SBA bonds	2,781	3,629
Corporate bonds		1,100
Preferred Stock	20	20
Total securities available-for-sale	121,884	153,744
Held-to-maturity
Mortgage backed security		50
Federal Home Loan Bank of Boston stock	5,747	6,032
Gross un-realized gains
Available-for-sale
U.S. Treasury notes	237	528
U.S. Government Agency notes	211	380
Municipal bonds	2,138	1,067
Mortgage backed securities, U.S. Government Agencies	1,284	1,126
Collateralized mortgage obligations, U.S. Government Agencies	66	76
Non-agency	494	355
SBA bonds	82	77
Corporate bonds		4
Preferred Stock	147	96
Total securities available-for-sale	4,659	3,709
Held-to-maturity
Mortgage backed security		2
Federal Home Loan Bank of Boston stock
Gross un-realized losses
Available-for-sale
U.S. Treasury notes
U.S. Government Agency notes
Municipal bonds	(168)	(1,152)
Mortgage backed securities, U.S. Government Agencies	(20)	(19)
Collateralized mortgage obligations, U.S. Government Agencies
Non-agency	(68)	(488)
SBA bonds
Corporate bonds
Preferred Stock
Total securities available-for-sale	(256)	(1,659)
Held-to-maturity
Mortgage backed security
Federal Home Loan Bank of Boston stock
Fair value
Available-for-sale
U.S. Treasury notes	2,733	5,528
U.S. Government Agency notes	7,726	14,924
Municipal bonds	47,365	50,796
Mortgage backed securities, U.S. Government Agencies	48,729	58,300
Collateralized mortgage obligations, U.S. Government Agencies	5,197	7,153
Non-agency	11,507	14,167
SBA bonds	2,863	3,706
Corporate bonds		1,104
Preferred Stock	167	116
Total securities available-for-sale	126,287	155,794
Held-to-maturity
Mortgage backed security		52
Federal Home Loan Bank of Boston stock	$ 5,747	$ 6,032