Troubled debt restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Integer	Dec. 31, 2020 USD ($) Integer
Residential real estate
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer	1	1
Pre-modification balance	$ 74	$ 180
Post-modification balance	$ 74	$ 180
Commercial and industrial
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer		1
Pre-modification balance		$ 133
Post-modification balance		$ 133
Consumer
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer
Pre-modification balance
Post-modification balance
Troubled debt restructurings
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer	1	2
Pre-modification balance	$ 74	$ 313
Post-modification balance	$ 74	$ 313
Interest only payments to sell property
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer
Pre-modification balance
Post-modification balance
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
Pre-modification balance
Post-modification balance
Extension of new funds to pay outstanding taxes
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer
Pre-modification balance
Post-modification balance
Modification And Term Extension Portfolio Segment [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer	1	2
Pre-modification balance	$ 74	$ 313
Post-modification balance	$ 74	$ 313
Finance Leases Portfolio Segment 1 [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Quantity | Integer	1	2
Pre-modification balance	$ 74	$ 313
Post-modification balance	$ 74	$ 313