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INVESTMENT SECURITIES (Schedule of Amortized Cost and Approximate Fair Value of Securities Available for Sale) (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Securities Available for Sale: |  |
Amortized Cost | $ 653,894 | $ 661,045
Gross Unrealized Gains | 61 | 28
Gross Unrealized Losses | (97,689) | (106,425)
Fair Value | 556,266 | 554,648
Securities Held to Maturity: |  |
Amortized Cost | 111,609 | 102,291
Gross Unrealized Losses | (13,642) | (15,104)
Fair Value | 97,967 | 87,187
U.S. Government-Sponsored Agencies [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 244,779 | 244,774
Gross Unrealized Losses | (49,992) | (54,232)
Fair Value | 194,787 | 190,542
Securities Held to Maturity: |  |
Amortized Cost | 40,000 | 40,000
Gross Unrealized Losses | (4,001) | (4,563)
Fair Value | 35,999 | 35,437
Mortgage-Backed Securities-Residential [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 366,852 | 372,471
Gross Unrealized Gains | 61 | 27
Gross Unrealized Losses | (42,726) | (46,760)
Fair Value | 324,187 | 325,738
Securities Held to Maturity: |  |
Amortized Cost | 71,609 | 62,291
Gross Unrealized Losses | (9,641) | (10,541)
Fair Value | 61,968 | 51,750
SBA Pool Securities [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 30,403 | 31,934
Gross Unrealized Gains |  | 1
Gross Unrealized Losses | (3,951) | (4,508)
Fair Value | 26,452 | 27,427
State and Political Subdivisions [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 1,860 | 1,866
Gross Unrealized Losses | (8) | (17)
Fair Value | 1,852 | 1,849
Corporate Bond [Member] |  |
Securities Available for Sale: |  |
Amortized Cost | 10,000 | 10,000
Gross Unrealized Losses | (1,012) | (908)
Fair Value | $ 8,988 | $ 9,092

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