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SECURITIES - Summary of Available For Sale Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Information related to available for sale securities |  |
Amortized Cost | $ 697,906 | $ 591,009
Gross Unrealized Gain | 37,045 | 17,841
Gross Unrealized Losses | (106) | (617)
Fair Value | 734,845 | 608,233
U.S. government sponsored agencies |  |
Information related to available for sale securities |  |
Amortized Cost | 36,492 |
Gross Unrealized Gain | 56 |
Gross Unrealized Losses | (61) |
Fair Value | 36,487 |
Mortgage-backed securities residential [Member] |  |
Information related to available for sale securities |  |
Amortized Cost | 270,231 | 283,817
Gross Unrealized Gain | 9,289 | 4,751
Gross Unrealized Losses | (17) | (387)
Fair Value | 279,503 | 288,181
Mortgage-backed securities commercial [Member] |  |
Information related to available for sale securities |  |
Amortized Cost | 35,877 | 36,712
Gross Unrealized Gain | 1,004 | 262
Gross Unrealized Losses | 0 | (2)
Fair Value | 36,881 | 36,972
State and Municipal Securities [Member] |  |
Information related to available for sale securities |  |
Amortized Cost | 355,306 | 270,480
Gross Unrealized Gain | 26,696 | 12,828
Gross Unrealized Losses | (28) | (228)
Fair Value | $ 381,974 | $ 283,080

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- Definition Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, including portion attributable to noncontrolling interest. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners). + References No definition available. + Details
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- Definition Amortized cost of 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 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
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