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SUPPLEMENTAL INFORMATION (Details) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2019 $ / shares shares | Dec. 31, 2019 USD ($) suezmax_tanker $ / shares shares | Dec. 31, 2018 USD ($) vessel very_large_crude_carrier shares | Dec. 31, 2017 vessel | Dec. 31, 2017 suezmax_tanker | Dec. 31, 2017 very_large_crude_carrier | Dec. 31, 2017 shares | Dec. 31, 2017 USD ($)
Other Significant Noncash Transactions [Line Items] |  |  |  |  |  |  |  |
Number of vessels with terminated leases |  |  | 6 |  | 2 | 2 |  |
Shares issued for purchase of vessels (in shares) | shares | 16,035,856 | 16,035,856 | 0 |  |  |  | 0 |
Number of assets acquired | suezmax_tanker |  | 10 |  |  |  |  |  |
Shares issued for purchase of assets, grant date fair value (in dollars per share) | $ / shares | $ 7.92 | $ 7.92 |  |  |  |  |  |
Stock issued for purchase of assets, total grant date fair value |  | $ 127.0 |  |  |  |  |  |
Front Scilla, Front Brabant, Front Ardenne | SFL |  |  |  |  |  |  |  |
Other Significant Noncash Transactions [Line Items] |  |  |  |  |  |  |  |
Number of vessels with terminated leases | vessel |  |  |  | 3 |  |  |  |
Reduction in capital lease obligation |  |  |  |  |  |  |  | $ 53.2
Front Circassia, Front Page, Front Stratus, Front Serenade, Front Ariake, Front Falcon | SFL |  |  |  |  |  |  |  |
Other Significant Noncash Transactions [Line Items] |  |  |  |  |  |  |  |
Number of vessels with terminated leases | vessel |  |  | 6 |  |  |  |  |
Reduction in capital lease obligation |  |  | $ 167.9 |  |  |  |  |

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