SECURITIES - Composition of securities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Available-for-sale
Total securities available-for-sale	$ 125,665	$ 155,794
Amortized cost (1)
Available-for-sale
U.S. Treasury notes	2,495	5,000
U.S. Government Agency notes	7,517	14,544
Municipal bonds	45,363	50,881
Mortgage backed securities, U.S. Government Agencies	45,214	57,193
Collateralized mortgage obligations, U.S. Government Agencies	5,671	7,077
Non-agency	11,969	14,300
SBA bonds	2,946	3,629
Corporate bonds		1,100
Preferred Stock	20	20
Total securities available-for-sale	121,195	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	250	528
U.S. Government Agency notes	238	380
Municipal bonds	2,107	1,067
Mortgage backed securities, U.S. Government Agencies	1,547	1,126
Collateralized mortgage obligations, U.S. Government Agencies	79	76
Non-agency	534	355
SBA bonds	87	77
Corporate bonds		4
Preferred Stock	34	96
Total securities available-for-sale	4,876	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	(286)	(1,152)
Mortgage backed securities, U.S. Government Agencies	(1)	(19)
Collateralized mortgage obligations, U.S. Government Agencies
Non-agency	(119)	(488)
SBA bonds
Corporate bonds
Preferred Stock
Total securities available-for-sale	(406)	(1,659)
Held-to-maturity
Mortgage backed security
Federal Home Loan Bank of Boston stock
Fair Value
Available-for-sale
U.S. Treasury notes	2,745	5,528
U.S. Government Agency notes	7,755	14,924
Municipal bonds	47,184	50,796
Mortgage backed securities, U.S. Government Agencies	46,760	58,300
Collateralized mortgage obligations, U.S. Government Agencies	5,750	7,153
Non-agency	12,384	14,167
SBA bonds	3,033	3,706
Corporate bonds		1,104
Preferred Stock	54	116
Total securities available-for-sale	125,665	155,794
Held-to-maturity
Mortgage backed security		52
Federal Home Loan Bank of Boston stock	$ 5,747	$ 6,032