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Note Derivative instruments and hedging activities (Cash flow hedges) (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized net (losses) gains on cash flow hedges | $ (5,741) | $ 536 | $ (1,295)
Cash flow hedging |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized net (losses) gains on cash flow hedges | (3,502) | 536 | (1,295)
Amount of net gain (loss) reclassified from AOCI into income (effective portion) | (3,992) | 1,202 | (1,920)
Amount of net gain (loss) recognized in income on derivatives (ineffective portion) | $ 0 | $ (92) | $ 32
Cash flow hedging | Forward contracts |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Classification in the statement of operations of the net gain (loss) reclassified from AOCI into income (effective portion and ineffective portion) | Mortgage banking activities | Mortgage banking activities | Mortgage banking activities
Unrealized net (losses) gains on cash flow hedges | $ (3,502) | $ 536 | $ (1,295)
Amount of net gain (loss) reclassified from AOCI into income (effective portion) | (3,992) | 1,202 | (1,920)
Amount of net gain (loss) recognized in income on derivatives (ineffective portion) | $ 0 | $ (92) | $ 32

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- Definition The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1),(2) -URI http://asc.fasb.org/extlink&oid=109977999&loc=d3e76258-113986 + Details
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