Restrictions on Cash and Cash Equivalents Schedule (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Noninterest bearing accounts
Cash and Cash Equivalents [Line Items]
Uninsured cash accounts	$ 190	$ 365
Federal Reserve Bank of Boston
Cash and Cash Equivalents [Line Items]
Uninsured cash accounts	117,225	45,638
FHLB of Boston
Cash and Cash Equivalents [Line Items]
Uninsured cash accounts	$ 1,578	$ 1,125