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Securities - Realized Gain (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Securities |  |  |
Proceeds from sales of securities | $ 605,846 | $ 18,006 | $ 191,298
Gross realized gains on securities | 270 | 17 | 5,521
Gross realized losses on securities | (38) | (42) | (1,010)
Net realized gains (losses) | 232 | (25) | 4,511
Income tax (expense) benefit on net realized gains (losses) | $ (65) | $ 7 | $ (1,267)
Effective tax rate applied (as a percent) | 28.00% | 28.00% | 28.10%

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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=123581744&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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563 + Details
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