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Derivative instruments and hedging activities - Derivative instruments and hedging activities- Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Derivative      
Fair Value Hedges, Net $ 0 $ 0  
Amount of net gain (loss) recognized in income on derivatives 1,512,000 7,746,000 $ 2,313,000
Derivative liabilities credit risk gain (losses) $ 400,000 $ (500,000) $ (300,000)