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FEDERAL HOME LOAN BANK OF BOSTON ADVANCES AND OTHER BORROWED FUNDS - Federal Home Loan Bank of Boston advances (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Total    
Overnight advances $ 10,000
2017 advances
2018 advances 34,000 7,000
2019 advances
2020 advances 14,655 14,495
2021 advances 5,767 5,693
Total advances $ 54,422 $ 37,188
Rate    
Overnight rate 0.80%
2017 rate
2018 rate 2.04% 3.69%
2019 rate
2020 rate 2.01% 2.08%
2021 rate 2.30% 2.39%
Total weighted average rate 2.06% 2.09%