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MARKETABLE SECURITIES - Securities in Continuous Loss Position (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Gross Unrealized Losses |  |
Less Than 12 Months | $ (949) | $ (95)
12 Months or Longer | (44) | (1)
Total | (993) | (96)
Estimated Fair Value |  |
Less Than 12 Months | 94,031 | 28,268
12 Months or Longer | 3,276 | 106
Total | 97,307 | 28,374
Gross Unrealized Losses |  |
Less Than 12 Months | (184) |
12 Months or Longer | 0 |
Total | 184 |
Estimated Fair Value |  |
Less Than 12 Months | 7,387 |
12 Months or Longer | 0 |
Total | 7,387 |
Corporate bonds |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (92) | (8)
12 Months or Longer | 0 |
Total | (92) | (8)
Estimated Fair Value |  |
Less Than 12 Months | 7,678 | 2,493
12 Months or Longer | 0 |
Total | 7,678 | 2,493
Mortgage-backed securities |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (803) | (87)
12 Months or Longer | (44) |
Total | (847) | (87)
Estimated Fair Value |  |
Less Than 12 Months | 68,150 | 25,775
12 Months or Longer | 3,276 |
Total | 71,426 | 25,775
Gross Unrealized Losses |  |
Less Than 12 Months | (37) |
12 Months or Longer | 0 |
Total | 37 |
Estimated Fair Value |  |
Less Than 12 Months | 3,006 |
12 Months or Longer | 0 |
Total | 3,006 |
Collateralized mortgage obligations |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (54) |
12 Months or Longer | 0 | (1)
Total | (54) | (1)
Estimated Fair Value |  |
Less Than 12 Months | 18,203 |
12 Months or Longer | 0 | 106
Total | 18,203 | $ 106
Municipal securities |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (147) |
12 Months or Longer | 0 |
Total | 147 |
Estimated Fair Value |  |
Less Than 12 Months | 4,381 |
12 Months or Longer | 0 |
Total | $ 4,381 |

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