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INVESTMENT SECURITIES (Schedule of Amortized Cost and Approximate Fair Value of Securities Available for Sale) (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Securities Available for Sale: |  |
Amortized Cost | $ 634,390 | $ 809,687
Gross Unrealized Gains | 109 | 3,927
Gross Unrealized Losses | (77,708) | (16,861)
Fair Value | 556,791 | 796,753
Securities Held to Maturity: |  |
Amortized Cost | 105,048 | 108,680
Gross Unrealized Gains |  | 74
Gross Unrealized Losses | (9,406) | (294)
Fair Value | 95,642 | 108,460
U.S. Government-Sponsored Agencies [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 244,765 | 280,045
Gross Unrealized Losses | (38,642) | (7,824)
Fair Value | 206,123 | 272,221
Securities Held to Maturity: |  |
Amortized Cost | 40,000 | 40,000
Gross Unrealized Gains |  | 7
Gross Unrealized Losses | (2,775) | (25)
Fair Value | 37,225 | 39,982
Mortgage-Backed Securities-Residential [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 342,272 | 481,062
Gross Unrealized Gains | 101 | 3,849
Gross Unrealized Losses | (35,545) | (7,937)
Fair Value | 306,828 | 476,974
Securities Held to Maturity: |  |
Amortized Cost | 65,048 | 68,680
Gross Unrealized Gains |  | 67
Gross Unrealized Losses | (6,631) | (269)
Fair Value | 58,417 | 68,478
SBA Pool Securities [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 35,836 | 40,649
Gross Unrealized Gains | 7 | 12
Gross Unrealized Losses | (3,260) | (1,100)
Fair Value | 32,583 | 39,561
State and Political Subdivisions [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 4,017 | 5,431
Gross Unrealized Gains | 1 | 45
Gross Unrealized Losses | (5) |
Fair Value | 4,013 | 5,476
Corporate Bond [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 7,500 | 2,500
Gross Unrealized Gains |  | 21
Gross Unrealized Losses | (256) |
Fair Value | $ 7,244 | $ 2,521

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