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Securities Securities (Summary of Gross Realized Gains and Gross Realized Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract] |  |  |  |
Proceeds from Sale of Debt Securities, Available-for-sale | $ 0 | $ 0 | $ 194,105 | $ 259,554
Gross Realized Gains from sales of debt securities available for sale | 0 | 0 | 435 | 3,357
Gross Realized Losses from sales of debt securities available for sale | 0 | 0 | (186) | (1,225)
Other securities gains | 0 | 0 | 16,425 | 0
Investment securities gain (loss), net | $ 0 | $ 0 | $ 16,674 | $ 2,132

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- Definition Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=120269885&loc=SL75117546-209714 + Details
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