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Fair value measurement - Gains and losses (realized and unrealized) included in earnings for level 3 assets and liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Abstract |  |  |  |
Gains (Losses) included in earnings | $ (2,796) | $ 8,732 | $ (10,407) | $ 11,990
Changes in unrealized gains (losses) included in earnings relating to assets still held | (377) | 1,990 | (1,807) | 11,568
Mortgage banking activities |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Abstract |  |  |  |
Gains (Losses) included in earnings | (2,793) | (499) | (10,386) | 2,776
Changes in unrealized gains (losses) included in earnings relating to assets still held | (381) | 1,984 | (1,828) | 11,556
Trading account (loss) profit |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Abstract |  |  |  |
Gains (Losses) included in earnings | (3) | (10) | (21) | (27)
Changes in unrealized gains (losses) included in earnings relating to assets still held | $ 4 | 6 | $ 21 | 12
Other operating income |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Abstract |  |  |  |
Gains (Losses) included in earnings |  | 9,241 |  | 9,241
Changes in unrealized gains (losses) included in earnings relating to assets still held |  | $ 0 |  | $ 0

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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset and liabilities, Gain (Loss) Included in Earnings + References No definition available. + Details
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- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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