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MARKETABLE SECURITIES - Securities in Continuous Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Gross Unrealized Losses |  |
Less Than 12 Months | $ (5,036) | $ (74)
12 Months or Longer | 727 | 81
Total | (5,763) | (155)
Estimated Fair Value |  |
Less Than 12 Months | 342,644 | 10,688
12 Months or Longer | 2,347 | 2,996
Total | 344,991 | 13,684
Gross Unrealized Losses |  |
Less Than 12 Months | (17,778) | (2,414)
12 Months or Longer | (2,443) | (396)
Total | (20,221) | (2,810)
Estimated Fair Value |  |
Less Than 12 Months | 256,694 | 205,928
12 Months or Longer | 22,846 | 11,317
Total | 279,540 | 217,245
U.S. government agencies |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (731) | (42)
12 Months or Longer | 0 |
Total | (731) | (42)
Estimated Fair Value |  |
Less Than 12 Months | 9,281 | 9,971
12 Months or Longer | 0 |
Total | 9,281 | 9,971
Corporate bonds |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (645) | (85)
12 Months or Longer | 0 |
Total | (645) | (85)
Estimated Fair Value |  |
Less Than 12 Months | 23,336 | 11,418
12 Months or Longer | 0 |
Total | 23,336 | 11,418
Mortgage-backed securities |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (1,534) | (37)
12 Months or Longer | 0 | 0
Total | (1,534) | (37)
Estimated Fair Value |  |
Less Than 12 Months | 30,753 | 2,916
12 Months or Longer | 0 | 0
Total | 30,753 | 2,916
Gross Unrealized Losses |  |
Less Than 12 Months | (12,285) | (1,383)
12 Months or Longer | (2,443) | (396)
Total | (14,728) | (1,779)
Estimated Fair Value |  |
Less Than 12 Months | 168,057 | 144,367
12 Months or Longer | 22,846 | 11,317
Total | 190,903 | 155,684
Collateralized mortgage obligations |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (4,117) | (904)
12 Months or Longer | 0 | 0
Total | (4,117) | (904)
Estimated Fair Value |  |
Less Than 12 Months | 56,020 | 40,172
12 Months or Longer | 0 | 0
Total | 56,020 | 40,172
Municipal securities |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (2,333) | (37)
12 Months or Longer | 727 | 81
Total | (3,060) | (118)
Estimated Fair Value |  |
Less Than 12 Months | 41,962 | 7,772
12 Months or Longer | 2,347 | 2,996
Total | 44,309 | $ 10,768
US Treasury Securities [Member] |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (1,169) |
12 Months or Longer | 0 |
Total | (1,169) |
Estimated Fair Value |  |
Less Than 12 Months | 269,929 |
12 Months or Longer | 0 |
Total | $ 269,929 |

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