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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 | 3 Months Ended | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Fee Income | Fee Income |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | $ 67 |  | $ 195 | $ 457
Derivatives not designated as hedging instruments |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | (120) | $ 195 | (170) | 87
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 Derivative | $ (120) | 194 | $ (170) | 56
Derivatives not designated as hedging instruments | Other Contracts | Other income / (expense) |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Amount of Gain or (Loss) Recognized in Income on Derivative |  | $ 1 |  | $ 31

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E + Details
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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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