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Derivatives and hedging activities - Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI Included Component		$ (1,056)		$ (871)
Amount of (Loss) Reclassified from Accumulated OCI into Income			$ (48)
Interest income
Derivative Instruments, Gain (Loss)
Amount of (Loss) Reclassified from Accumulated OCI into Income	$ (16)
Cash Flow Hedge
Derivative Instruments, Gain (Loss)
Amount of (Loss) Recognized in OCI on Derivative			(1)
Amount of (Loss) Recognized in OCI Excluded Component			(1)
Amount of (Loss) Reclassified from Accumulated OCI into Income	(16)		(48)
Amount of (Loss) Reclassified from Accumulated OCI into Income Excluded Component	(16)		(48)
Cash Flow Hedge | Interest rate products | Interest income
Derivative Instruments, Gain (Loss)
Amount of (Loss) Recognized in OCI on Derivative			(1)
Amount of (Loss) Recognized in OCI Excluded Component			(1)
Amount of (Loss) Reclassified from Accumulated OCI into Income	(16)		(48)
Amount of (Loss) Reclassified from Accumulated OCI into Income Excluded Component	$ (16)		$ (48)

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- Definition

Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge excluded in assessment of hedge effectiveness.

+ References

No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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-Topic 815
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-Section 50
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The net gain (loss) relating to components of the gain (loss) on the cash flow hedging instrument excluded from the assessment of cash flow hedge effectiveness. Recognized in earnings.

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Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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Amount before tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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