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Investment Securities - Components of Investment Securities Gains and Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Available for sale securities: |  |  |  |
Gains realized on sales | $ 6 | $ 47 | $ 6 | $ 253
Losses realized on sales | (46) | 0 | (46) |
Other-than-temporary impairment recognized | 0 | 0 |  |
Other investment securities: |  |  |  |
Fair value adjustments, net | 0 | 3 |  | 3
Investment securities (losses) gains, net | (40) | 50 | (40) | 256
Proceeds from sale of U S treasury securities | $ 21,500 | $ 25,400 | $ 21,503 | $ 77,168

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- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
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