Troubled debt restructurings occurring during the years ended December 31, 2020 and 2019: (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Integer	Dec. 31, 2019 USD ($) Integer
Residential real estate
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer	1	3
Pre-modification balance	$ 180	$ 1,416
Post-modification balance	$ 180	$ 1,416
Commercial and industrial
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer	1	4
Pre-modification balance	$ 133	$ 977
Post-modification balance	$ 133	$ 1,191
Consumer
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer		1
Pre-modification balance
Post-modification balance		$ 36
Troubled debt restructurings
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer	2	8
Pre-modification balance	$ 313	$ 2,393
Post-modification balance	$ 313	$ 2,643
Interest only payments to sell property
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer		1
Pre-modification balance		$ 791
Post-modification balance		$ 791
Rate reduction
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer
Pre-modification balance
Post-modification balance
Modification and Rate reduction
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer		2
Pre-modification balance		$ 625
Post-modification balance		$ 625
Extension of new funds to pay outstanding taxes
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer		3
Pre-modification balance		$ 259
Post-modification balance		$ 442
Modification And Term Extension Portfolio Segment [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer	2	2
Pre-modification balance	$ 313	$ 718
Post-modification balance	$ 313	$ 785
Finance Leases Portfolio Segment 1 [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer	2	8
Pre-modification balance	$ 313	$ 2,393
Post-modification balance	$ 313	$ 2,643