SECURITIES - Composition of securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Available-for-sale
Total securities available-for-sale	$ 135,662	$ 155,794
Amortized cost (1)
Available-for-sale
U.S. Treasury notes	2,495	5,000
U.S. Government Agency notes	12,519	14,544
Municipal bonds	45,902	50,881
Mortgage backed securities, U.S. Government Agencies	49,072	57,193
Collateralized mortgage obligations, U.S. Government Agencies	6,134	7,077
Non-agency	12,776	14,300
SBA bonds	3,195	3,629
Corporate bonds		1,100
Preferred Stock	20	20
Total securities available-for-sale	132,113	153,744
Held-to-maturity
Mortgage backed security		50
Federal Home Loan Bank of Boston stock	5,747	6,032
Gross unrealized gains
Available-for-sale
U.S. Treasury notes	252	528
U.S. Government Agency notes	282	380
Municipal bonds	1,774	1,067
Mortgage backed securities, U.S. Government Agencies	1,412	1,126
Collateralized mortgage obligations, U.S. Government Agencies	53	76
Non-agency	377	355
SBA bonds	71	77
Corporate bonds		4
Preferred Stock	123	96
Total securities available-for-sale	4,344	3,709
Held-to-maturity
Mortgage backed security		2
Federal Home Loan Bank of Boston stock
Gross unrealized losses
Available-for-sale
U.S. Treasury notes
U.S. Government Agency notes
Municipal bonds	(512)	(1,152)
Mortgage backed securities, U.S. Government Agencies	(1)	(19)
Collateralized mortgage obligations, U.S. Government Agencies
Non-agency	(282)	(488)
SBA bonds
Corporate bonds
Preferred Stock
Total securities available-for-sale	(795)	(1,659)
Held-to-maturity
Mortgage backed security
Federal Home Loan Bank of Boston stock
Fair value
Available-for-sale
U.S. Treasury notes	2,747	5,528
U.S. Government Agency notes	12,801	14,924
Municipal bonds	47,164	50,796
Mortgage backed securities, U.S. Government Agencies	50,483	58,300
Collateralized mortgage obligations, U.S. Government Agencies	6,187	7,153
Non-agency	12,871	14,167
SBA bonds	3,266	3,706
Corporate bonds		1,104
Preferred Stock	143	116
Total securities available-for-sale	135,662	155,794
Held-to-maturity
Mortgage backed security		52
Federal Home Loan Bank of Boston stock	$ 5,747	$ 6,032