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SHARE OPTION PLAN (Details) - USD ($) $ / shares in Units, $ in Millions |  | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 04, 2019 | Mar. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2018
Number of options exercised (shares) |  |  | 13,334 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  | 2,461 | 0
Unrecognized compensation costs related to non-vested options granted |  |  | $ 1.2 | $ 0.3
Ship Finance International Limited Share Option Scheme [Member] |  |  |  |
Credit to additional paid-in capital |  |  | $ 0.4 |
Employee Stock Option [Member] |  |  |  |
Number of options awarded (shares) | 100,000 | 425,000 |  |
Initial strike price (usd per share) | $ 11.50 | $ 12.35 |  |
New Options Granted During The Year [Member] |  |  |  |
Term of options | 5 years | 5 years |  |
Vesting period | 3 years | 3 years |  |

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