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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Consolidated Statements of Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Net loss | $ (484,802) | $ 234,956 | $ 62,242 | $ 95,150 | $ 111,319 | $ 90,090 | $ (187,604) | $ 296,559
Comprehensive (loss) income | (486,866) |  |  | 98,202 |  |  | (182,257) | $ 290,744
Accumulated Deficit |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Net loss | (484,802) | $ 234,956 | $ 62,242 | $ 95,150 | $ 111,319 | $ 90,090 |  |
As Reported |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Net loss | (48,752) |  |  |  |  |  | 248,446 |
Comprehensive (loss) income | (50,816) |  |  |  |  |  | 253,793 |
As Reported | Accumulated Deficit |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Net loss | (48,752) |  |  |  |  |  |  |
Adjustments |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Net loss | (436,050) |  |  |  |  |  | (436,050) |
Comprehensive (loss) income | (436,050) |  |  |  |  |  | $ (436,050) |
Adjustments | Accumulated Deficit |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Net loss | $ (436,050) |  |  |  |  |  |  |

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