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SEGMENT REPORTING - Revenue and Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenue and long lived assets |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 107,806 | $ 121,138 | $ 117,788 | $ 104,475 | $ 107,701 | $ 122,132 | $ 123,245 | $ 128,115 | $ 451,207 | $ 481,193 | $ 457,003
Long-Lived Assets | 831,538 |  |  |  | 861,484 |  |  |  | 831,538 | 861,484 | 680,461
U.S |  |  |  |  |  |  |  |  |  |  |
Revenue and long lived assets |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 132,288 | 173,632 | 198,300
Long-Lived Assets | 234,514 |  |  |  | 358,032 |  |  |  | 234,514 | 358,032 | 265,528
Guyana |  |  |  |  |  |  |  |  |  |  |
Revenue and long lived assets |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 102,056 | 93,524 | 91,653
Long-Lived Assets | 151,084 |  |  |  | 129,909 |  |  |  | 151,084 | 129,909 | 132,609
U.S. Virgin Islands |  |  |  |  |  |  |  |  |  |  |
Revenue and long lived assets |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 79,785 | 83,194 | 58,431
Long-Lived Assets | 216,173 |  |  |  | 137,018 |  |  |  | 216,173 | 137,018 | 110,773
Bermuda |  |  |  |  |  |  |  |  |  |  |
Revenue and long lived assets |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 103,281 | 127,244 | 83,006
Long-Lived Assets | 137,992 |  |  |  | 165,243 |  |  |  | 137,992 | 165,243 | 94,976
Other Foreign Countries |  |  |  |  |  |  |  |  |  |  |
Revenue and long lived assets |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 33,797 | 3,599 | 25,613
Long-Lived Assets | $ 91,774 |  |  |  | $ 71,282 |  |  |  | $ 91,774 | $ 71,282 | $ 76,575

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