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RELATED PARTY TRANSACTIONS (Schedule of dividends and interest income received from shares held in and secured notes issued by related parties) (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Related Party Transaction [Line Items] |  |
Dividend income - related parties | $ 0 | $ 3,884
ADS Maritime Holding |  |
Related Party Transaction [Line Items] |  |
Dividend income - related parties | 0 | 1,508
Frontline |  |
Related Party Transaction [Line Items] |  |
Dividend income - related parties | 0 | 2,376
NorAm Drilling |  |
Related Party Transaction [Line Items] |  |
Interest income | $ 0 | $ 210

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- Definition Dividend Income From Related Parties + References No definition available. + Details
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- Definition Amount of interest income earned from interest-bearing assets owed to the entity by related party. + References No definition available. + Details
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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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- Details
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- Details
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- Details
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