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Cash and Due From Banks	12 Months Ended
Cash and Due From Banks	Dec. 31, 2019
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents Disclosure [Text Block]	Cash and Due from Banks Cash and due from banks includes cash on hand, cash items in the process of collection, compensating balances, and amounts due from correspondent banks and the Federal Reserve Bank of Boston. Compensating Balances. We maintain collected cash balances with a commercial bank in return for certain services. The related agreement contains no legal restrictions on the withdrawal of funds. The average collected cash balance was $19.3 million and $16.3 million for the years ended December 31, 2019 and 2018, respectively.