Loans, Allowance for Credit Losses and Credit Quality TDR on Financing Receivables Post Modification (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 827,000	$ 453,000	$ 3,639,000	$ 789,000
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification				831,000
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	0	0	0	0
Contractual Interest Rate Reduction [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	218,000	0	822,000	150,000
Court ordered concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	0	0	25,000	75,000
Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 609,000	$ 453,000	$ 2,792,000	$ 606,000