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Derivatives and hedging activities - Effect of Fair Value and Cash Flow Hedge Accounting on the Income Statement (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Derivative Instruments, Gain (Loss) |  |  |  |
Total amounts of income and expense line items presented in the statements of income and comprehensive income in which the effects of fair value or cash flow hedges are recorded | $ (135) | $ (543) | $ 106 | $ 493
Interest income |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Total amounts of income and expense line items presented in the statements of income and comprehensive income in which the effects of fair value or cash flow hedges are recorded | 134 | 110 | 268 | 146
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income | 134 | 110 | 268 | 146
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component | 150 | 126 | 300 | 178
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component | $ (16) | (16) | (32) | (32)
Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Total amounts of income and expense line items presented in the statements of income and comprehensive income in which the effects of fair value or cash flow hedges are recorded |  | 73 | (48) | 73
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income |  | 73 | (23) | 73
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income as a result that a forecasted transaction is no longer probable of occurring |  |  | (25) |
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component |  | $ 73 | $ (48) | $ 73

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