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Fair value of financial instruments - Schedule of Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring Basis - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans individually evaluated for credit loss	$ 16,785
Other real estate owned	711
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans individually evaluated for credit loss	16,785
Other real estate owned	$ 711	$ 738

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