FEDERAL HOME LOAN BANK OF BOSTON ADVANCES - Federal Home Loan Bank of Boston (FHLBB) advances (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Total
2012		$ 12,636
2013	1,569	11,569
2014	1,598	1,598
2015	791	791
2016	15,022	15,021
2017	6,000	6,000
2018	7,000	7,000
Total	31,980	54,615
Callable
2012		5,000
2013		10,000
2014
2015
2016	15,000	15,000
2017	6,000	6,000
2018
Total	$ 21,000	$ 36,000
Rate
2012, Rate	0.00%	3.44%
2013, Rate	389.00%	475.00%
2014, Rate	387.00%	387.00%
2015, Rate	388.00%	388.00%
2016, Rate	408.00%	408.00%
2017, Rate	405.00%	405.00%
2018, Rate	374.00%	374.00%
Total	3.99%	4.00%