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Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Lease cost      
Operating lease cost $ 1,331 $ 1,616 $ 1,681
Amortization of right-of-use asset 314 166  
Interest on lease liability 129 70  
Short-term lease cost 142 219 128
Variable lease cost 46 52 43
Total lease cost 1,962 2,123 1,852
Operating leases:      
Right-of-use assets $ 3,221 $ 2,404  
Right-of-use assets, line item in Statement of Financial Position Other assets Other assets  
Lease liabilities $ 3,324 $ 2,488  
Operating Lease, Liability, Statement of Financial Position [Extensible List] Other liabilities Other liabilities  
Weighted average remaining lease term (years) 7 years 3 years  
Weighted average discount rate 1.70% 2.20%  
Finance leases:      
Right of use assets $ 5,879 $ 6,193  
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Other assets. Other assets.  
Lease liabilities $ 6,346 $ 6,305  
Finance Lease, Liability, Statement of Financial Position [Extensible List] Secured Debt Secured Debt  
Weighted average remaining lease term (years) 18 years 6 months 19 years 6 months  
Weighted average discount rate 2.00% 2.00%  
Right-of-use assets obtained in exchange for lease liabilities $ 2,480 $ 1,110 1,140
Right of use assets obtained in exchange for lease liabilities under finance leases   6,360  
Lease incentives received, finance leases 236    
Lease incentives received, operating leases   115 27
Operating cash flows 1,313 1,659 1,567
Operating cash flows 129 70  
Finance cash flows 195 53  
Total cash flows $ 1,637 $ 1,782 $ 1,567