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MARKETABLE SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract] |
Schedule of Marketable Securities |
(in thousands) | December 31, 2018
Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
Municipal bonds | $ | 44,802 |  |  | $ | 13 |  |  | $ | (110 | ) |  | $ | 44,705 |
Corporate bonds | 48,499 |  |  | 23 |  |  | (226 | ) |  | 48,296 |
| $ | 93,301 |  |  | $ | 36 |  |  | $ | (336 | ) |  | $ | 93,001 |
(in thousands) | December 31, 2017
Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
Municipal bonds | $ | 32,996 |  |  | $ | — |  |  | $ | (148 | ) |  | $ | 32,848 |
Corporate bonds | 28,757 |  |  | 1 |  |  | (137 | ) |  | 28,621 |
| $ | 61,753 |  |  | $ | 1 |  |  | $ | (285 | ) |  | $ | 61,469 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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