Derivatives and hedging activities - Effect of Other Derivative Instruments on the Income Statement (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Derivative Instruments, Gain (Loss)
Amount of Gain Recognized in Income	$ (161)	$ 242
Interest Rate Swaps | Interest Rate Swap Revenue
Derivative Instruments, Gain (Loss)
Amount of Gain Recognized in Income	(161)	240
Other
Derivative Instruments, Gain (Loss)
Amount of Gain Recognized in Income		2
Fee Income | Interest Rate Swap Revenue
Derivative Instruments, Gain (Loss)
Amount of Gain Recognized in Income	$ 384	$ 103