Derivatives and hedging activities - Effect of Fair Value and Cash Flow Hedge Accounting on the Consolidated Statements of Income and Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Derivative Instruments, Gain (Loss)
income comprehensive income in which the effects of fair value or cash flow hedges are recorded.	$ (148)	$ 1,079
The effects of fair value and cash flow hedging:
Derivative, Excluded Component, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest Income (Expense), Operating	Interest Income (Expense), Operating
Interest income
Derivative Instruments, Gain (Loss)
income comprehensive income in which the effects of fair value or cash flow hedges are recorded.	$ 255	$ (3,447)
The effects of fair value and cash flow hedging:
Hedged items	107	(1,567)
Derivatives designated as hedging instruments	$ 148	$ (1,880)

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

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Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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Indicates line item in statement of income or comprehensive income that includes gain (loss) recognized in earnings from excluded component of derivative hedge.

+ References

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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