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Leases (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Lease cost      
Operating lease cost $ 1,008,000 $ 1,331,000 $ 1,616,000
Amortization of right-of-use asset 314,000 314,000 166,000
Interest on lease liability 125,000 129,000 70,000
Short-term lease cost 139,000 142,000 219,000
Variable lease cost 97,000 46,000 52,000
Total lease cost 1,683,000 1,962,000 2,123,000
Operating leases:      
Right-of-use assets $ 2,887,000 $ 3,221,000  
Right-of-use assets, line item in Statement of Financial Position Other assets Other assets  
Lease liabilities $ 2,965,000 $ 3,324,000  
Operating Lease, Liability, Statement of Financial Position [Extensible List] Other liabilities Other liabilities  
Weighted average remaining lease term (years) 6 years 6 months 7 years  
Weighted average discount rate 1.60% 1.70%  
Finance leases:      
Right of use assets $ 5,565,000 $ 5,879,000  
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Other assets. Other assets.  
Lease liabilities $ 6,141,000 $ 6,346,000  
Finance Lease, Liability, Statement of Financial Position [Extensible List] Secured Debt Secured Debt  
Weighted average remaining lease term (years) 17 years 6 months 18 years 6 months  
Weighted average discount rate 2.00% 2.00%  
Right-of-use assets obtained in exchange for lease liabilities $ 888,000 $ 2,480,000 1,110,000
Right of use assets obtained in exchange for lease liabilities under finance leases     6,360,000
Lease incentives received, finance leases 235,000 236,000  
Lease incentives received, operating leases     115,000
Operating cash flows 1,823,000 1,313,000 1,659,000
Operating cash flows 125,000 129,000 70,000
Finance cash flows 440,000 195,000 53,000
Total cash flows $ 2,388,000 $ 1,637,000 $ 1,782,000