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SECURITIES AVAILABLE FOR SALE - Summary of Securities Available for Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Investment Holdings [Line Items] |  |
Amortized Cost | $ 539,586 | $ 571,977
Gross Unrealized Gains | 9,507 | 14,637
Gross Unrealized Losses | (3,766) | (1,568)
Fair Value | 545,327 | 585,046
US Government-sponsored enterprises |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 181,821 | 206,834
Gross Unrealized Gains | 3,386 | 6,018
Gross Unrealized Losses | (1,939) | (462)
Fair Value | 183,268 | 212,390
US Government agency |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 53,475 | 82,878
Gross Unrealized Gains | 1,470 | 2,870
Gross Unrealized Losses | (239) | (116)
Fair Value | 54,706 | 85,632
Private label |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 62,843 | 19,810
Gross Unrealized Gains | 185 | 40
Gross Unrealized Losses | (114) | (141)
Fair Value | 62,914 | 19,709
Obligations of states and political subdivisions thereof |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 158,914 | 164,766
Gross Unrealized Gains | 2,090 | 4,244
Gross Unrealized Losses | (827) | (6)
Fair Value | 160,177 | 169,004
Corporate bonds |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 82,533 | 97,689
Gross Unrealized Gains | 2,376 | 1,465
Gross Unrealized Losses | (647) | (843)
Fair Value | $ 84,262 | $ 98,311

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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