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Derivatives and hedging activities - Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI Included Component			$ (14)		$ 680
Interest expense
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income				$ (23)
Interest income
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	$ 93	$ 134	224	268
Interest Rate Floor | Interest income
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI on Derivative			(469)	(25)
Amount of Gain (Loss) Recognized in OCI Included Component			(493)	(83)
Amount of Loss Recognized in OCI Excluded Component			24	7
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income			224	268
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component			256	300
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Excluded Component			(32)	(32)
Cash Flow Hedge
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI on Derivative			(469)	376
Amount of Gain (Loss) Recognized in OCI Included Component			(493)	318
Amount of Loss Recognized in OCI Excluded Component			24	7
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income			224	220
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component			256	252
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Excluded Component			$ (32)	(32)
Cash Flow Hedge | Interest expense
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI on Derivative				401
Amount of Gain (Loss) Recognized in OCI Included Component				401
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income				(23)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component				$ (23)

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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.

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The 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, 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 of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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