Leases - Lease right-of-use assets and liabilities (Details) $ in Thousands	Mar. 31, 2022 USD ($) item	Dec. 31, 2021 USD ($)
Leases
Number of finance leases | item	1
Lease Right-of-Use Assets
Operating lease right-of-use assets	$ 3,360	$ 3,727
Finance lease right-of-use assets	$ 58	$ 87
Finance Lease, Right-of-Use Asset, balance sheet location	Land, premises and equipment, net	Land, premises and equipment, net
Lease right-of-use assets	$ 3,418	$ 3,814
Operating lease liabilities	3,850	4,275
Finance lease liabilities	$ 143	$ 203
Finance lease liabilities, balance sheet location	Long-term debt	Long-term debt
Lease liabilities	$ 3,993	$ 4,478