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Derivatives and hedging activities - Effect of Derivative Instruments Not Designated as Hedging Instruments on the Consolidated Statements of Income and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Fee Income | Fee Income |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Amount of Gain or (Loss) Recognized in Income on Derivatives | $ 368 | $ 652 | $ 106
Derivatives not designated as hedging instruments |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Amount of Gain or (Loss) Recognized in Income on Derivatives | (90) | (268) | 521
Derivatives not designated as hedging instruments | Interest Rate Products | Other income / (expense) |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Amount of Gain or (Loss) Recognized in Income on Derivatives | (83) | (262) | 516
Derivatives not designated as hedging instruments | Other Contracts | Other income / (expense) |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Amount of Gain or (Loss) Recognized in Income on Derivatives | $ (7) | $ (6) | $ 5

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC + Details
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