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INVESTMENTS - Unrealized gains and losses (Details) - Municipal Bonds [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Net Investment Income [Line Items] |  |
Unrealized Gains | $ 866 | $ 388
Unrealized Losses |  | $ (76)

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of unrealized gain on investment in marketable security. + References No definition available. + Details
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- Definition Amount of unrealized loss on investment in marketable security. + References No definition available. + Details
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- Details
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