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Other Derivatives - Designated cash flow hedges (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Designated Cash Flow Hedge |  |  |  |
Gain or (loss) on cash flow hedging relationships in Subtopic 815-20 |  |  |  |
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income | $ (394) | $ 313 | $ (366) | $ 1,604
Interest Expenses |  |  |  |
Gain or (loss) on cash flow hedging relationships in Subtopic 815-20 |  |  |  |
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of fair value or cash flow hedges are recorded | (394) | 313 | (366) | 775
Interest Expenses | Designated Cash Flow Hedge |  |  |  |
Gain or (loss) on cash flow hedging relationships in Subtopic 815-20 |  |  |  |
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income | (394) | 313 | (366) | 775
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income - Included Component | $ (394) | $ 313 | $ (366) | 775
Gain on sale of investment securities |  |  |  |
Gain or (loss) on cash flow hedging relationships in Subtopic 815-20 |  |  |  |
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of fair value or cash flow hedges are recorded |  |  |  | 829
Gain on sale of investment securities | Designated Cash Flow Hedge |  |  |  |
Gain or (loss) on cash flow hedging relationships in Subtopic 815-20 |  |  |  |
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 |  |  |  | $ 829

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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80845-113994 + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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