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INVESTMENT SECURITIES AVAILABLE FOR SALE (Schedule of Amortized Cost and Approximate Fair Value of Securities Available for Sale) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | $ 885,626 | $ 615,396
Gross Unrealized Gains | 6,935 | 8,768
Gross Unrealized Losses | (17,260) | (1,475)
Fair Value | 875,301 | 622,689
U.S. Government-Sponsored Agencies [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 229,199 | 84,424
Gross Unrealized Gains | 0 | 2
Gross Unrealized Losses | (7,862) | (655)
Fair Value | 221,337 | 83,771
Mortgage-Backed Securities-Residential [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 598,088 | 467,915
Gross Unrealized Gains | 6,786 | 8,604
Gross Unrealized Losses | (8,254) | (461)
Fair Value | 596,620 | 476,058
SBA Pool Securities [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 47,372 | 49,457
Gross Unrealized Gains | 15 | 31
Gross Unrealized Losses | (1,144) | (359)
Fair Value | 46,243 | 49,129
State and Political Subdivisions [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 7,967 | 7,987
Gross Unrealized Gains | 86 | 102
Gross Unrealized Losses | 0 | 0
Fair Value | 8,053 | 8,089
Corporate Bond [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 3,000 | 3,000
Gross Unrealized Gains | 48 | 29
Gross Unrealized Losses | 0 | 0
Fair Value | $ 3,048 | 3,029
U.S. Treasuries [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost |  | 2,613
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Fair Value |  | $ 2,613

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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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