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Securities - Realized Gain (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Securities |  |  |  |  |
Proceeds from sales of securities | $ 26,873 |  | $ 35,075 | $ 18,006 |
Gross realized gains on securities | 262 |  | 267 | 17 |
Gross realized losses on securities | (18) | $ (1) | (21) | (42) |
Net realized gains (losses) | 244 | $ (1) | 246 | (25) |
Income tax (expense) benefit on net realized gains (losses) | $ (69) |  | $ (70) | $ 7 |
Effective tax rate applied (as a percent) | 28.30% | 0.00% | 28.50% | 28.00% |
Available-for-sale Securities Pledged as Collateral | $ 353,200 |  | $ 353,200 |  | $ 335,800

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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=121645371&loc=d3e27357-111563 + Details
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