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MARKETABLE SECURITIES - Securities in Continuous Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Gross Unrealized Losses |  |
Less Than 12 Months | $ (470) | $ (33)
12 Months or Longer | (72) | (327)
Total | (542) | (360)
Estimated Fair Value |  |
Less Than 12 Months | 71,349 | 20,559
12 Months or Longer | 8,101 | 44,710
Total | 79,450 | 65,269
Gross Unrealized Losses |  |
Less Than 12 Months |  | (1)
12 Months or Longer |  | (15)
Total |  | (16)
Estimated Fair Value |  |
Less Than 12 Months |  | 1,313
12 Months or Longer |  | 7,791
Total |  | 9,104
Corporate bonds |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (103) |
12 Months or Longer | 0 | 0
Total | (103) |
Estimated Fair Value |  |
Less Than 12 Months | 11,430 |
12 Months or Longer | 0 | 0
Total | 11,430 |
Mortgage-backed securities |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (13) | (25)
12 Months or Longer | (54) | (310)
Total | (67) | (335)
Estimated Fair Value |  |
Less Than 12 Months | 4,233 | 19,421
12 Months or Longer | 5,840 | 42,116
Total | 10,073 | 61,537
Gross Unrealized Losses |  |
Less Than 12 Months |  | 0
12 Months or Longer |  | (13)
Total |  | (13)
Estimated Fair Value |  |
Less Than 12 Months |  | 0
12 Months or Longer |  | 7,032
Total |  | 7,032
Collateralized mortgage obligations |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (66) |
12 Months or Longer | (18) | (17)
Total | (84) | (17)
Estimated Fair Value |  |
Less Than 12 Months | 26,914 |
12 Months or Longer | 2,261 | 2,594
Total | 29,175 | 2,594
Gross Unrealized Losses |  |
Less Than 12 Months |  | 0
12 Months or Longer |  | 0
Total |  | 0
Estimated Fair Value |  |
Less Than 12 Months |  | 0
12 Months or Longer |  | 0
Total |  | 0
Municipal securities |  |
Gross Unrealized Losses |  |
Less Than 12 Months | (288) | (8)
12 Months or Longer | 0 |
Total | (288) | (8)
Estimated Fair Value |  |
Less Than 12 Months | 28,772 | 1,138
12 Months or Longer | 0 |
Total | $ 28,772 | 1,138
Gross Unrealized Losses |  |
Less Than 12 Months |  | (1)
12 Months or Longer |  | (2)
Total |  | (3)
Estimated Fair Value |  |
Less Than 12 Months |  | 1,313
12 Months or Longer |  | 759
Total |  | $ 2,072

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