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Derivatives and hedging activities - Credit-risk-related Contingent Features (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Derivatives    
Derivative Liability $ 21,466 $ 8,818
Cash collateral 14,530  
Credit-risk contract    
Derivatives    
Derivative Liability 2,000 5,600
Cash collateral $ 7,400 $ 7,400