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INVESTMENT SECURITIES (Schedule of Available for Sale Securities in Continuous Unrealized Loss Position and Approximate Fair Value of Investments) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Available for Sale Securities, Fair Value |  |
Less Than 12 Months | $ 251,131 | $ 530,647
12 Months or Longer | 294,023 | 73,051
Total | 545,154 | 603,698
Approximate Fair Value |  |
Less Than 12 Months | (18,127) | (14,478)
12 Months or Longer | (35,380) | (2,383)
Total | (53,507) | (16,861)
Held to Maturity Securities, Fair Value |  |
Less Than 12 Months | 100,314 | 73,282
12 Months or Longer |  | 0
Total | 100,314 | 73,282
Held to Maturity Securities, Unrealized Losses |  |
Less Than 12 Months | (6,502) | (294)
12 Months or Longer |  | 0
Total | (6,502) | (294)
Approximate Fair Value |  |
Fair Value, Less than 12 months | 351,445 | 603,929
Fair Value, 12 months or longer | 294,023 | 73,051
Fair Value | 645,468 | 676,980
Unrealized Losses |  |
Unrealized Losses, Less than 12 months | (24,629) | (14,772)
Unrealized Losses, 12 months or longer | (35,380) | (2,383)
Unrealized Losses | (60,009) | (17,155)
U.S. Government-Sponsored Agencies [Member] |  |
Available for Sale Securities, Fair Value |  |
Less Than 12 Months | 90,578 | 243,187
12 Months or Longer | 127,685 | 29,034
Total | 218,263 | 272,221
Approximate Fair Value |  |
Less Than 12 Months | (9,277) | (6,858)
12 Months or Longer | (17,221) | (966)
Total | (26,498) | (7,824)
Held to Maturity Securities, Fair Value |  |
Less Than 12 Months | 38,018 | 24,975
12 Months or Longer |  | 0
Total | 38,018 | 24,975
Held to Maturity Securities, Unrealized Losses |  |
Less Than 12 Months | (1,982) | (25)
12 Months or Longer |  | 0
Total | (1,982) | (25)
Mortgage-Backed Securities-Residential [Member] |  |
Available for Sale Securities, Fair Value |  |
Less Than 12 Months | 132,068 | 265,403
12 Months or Longer | 156,945 | 33,455
Total | 289,013 | 298,858
Approximate Fair Value |  |
Less Than 12 Months | (7,083) | (7,053)
12 Months or Longer | (16,959) | (884)
Total | (24,042) | (7,937)
Held to Maturity Securities, Fair Value |  |
Less Than 12 Months | 62,296 | 48,307
12 Months or Longer |  | 0
Total | 62,296 | 48,307
Held to Maturity Securities, Unrealized Losses |  |
Less Than 12 Months | (4,520) | (269)
12 Months or Longer |  | 0
Total | (4,520) | (269)
SBA Pool Securities [Member] |  |
Available for Sale Securities, Fair Value |  |
Less Than 12 Months | 24,484 | 22,057
12 Months or Longer | 9,393 | 10,562
Total | 33,877 | 32,619
Approximate Fair Value |  |
Less Than 12 Months | (1,653) | (567)
12 Months or Longer | (1,200) | (533)
Total | (2,853) | $ (1,100)
State and Political Subdivisions [Member] |  |
Available for Sale Securities, Fair Value |  |
Less Than 12 Months | 1,609 |
12 Months or Longer | 0 |
Total | 1,609 |
Approximate Fair Value |  |
Less Than 12 Months | (6) |
12 Months or Longer | 0 |
Total | (6) |
Corporate Bond [Member] |  |
Available for Sale Securities, Fair Value |  |
Less Than 12 Months | 2,392 |
12 Months or Longer | 0 |
Total | 2,392 |
Approximate Fair Value |  |
Less Than 12 Months | (108) |
12 Months or Longer | 0 |
Total | $ (108) |

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