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Investment Securities - Other (Details) $ in Thousands | Mar. 31, 2019 USD ($) security | Dec. 31, 2018 USD ($) security
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Investment Securities |  |
Number of securities consisted in portfolio | security | 353 | 366
Number of securities in loss position | security | 258 |
Number of Positions for unrealized losses | security |  | 317
Aggregate fair value of securities in loss position | $ | $ 179,110 | $ 192,724
Loss position for 12 months or longer | $ | 159,980 | 174,791
Aggregate unrealized loss included in accumulated other comprehensive income (loss) | $ | $ 2,863 | $ 4,496

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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