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Related party transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025
Related party transactions |  |  |
Interest bearing deposits | $ 3,456,028 |  | $ 3,479,584
Payment to goods or services from related party | 78 | $ 86 |
Related party |  |  |
Related party transactions |  |  |
Outstanding balance of non-performing loans | 0 |  | 0
Interest bearing deposits | $ 173,700 |  | $ 161,500

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