v3.10.0.1

Schedule I, Condensed Financial Statements, Notes (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Profit/(Loss) Reconciliation [Abstract] |  |  |  |
Profit/(loss) for the period | $ 41,596 | $ (111,804) | $ (4,855) |
Additional profit/(loss) if subsidiaries had been accounted for using the equity method of accounting as opposed to cost method | 5,231 | 5,351 | 6,646 |
Equity Reconciliation [Abstract] |  |  |  |
Shareholders equity | 1,756,112 | 1,895,453 | 1,959,111 | $ 2,023,501
Parent [Member] |  |  |  |
Basis of Presentation [Abstract] |  |  |  |
Cash dividend receivable from subsidiaries | 0 | 10,383 | 29,737 |
Profit/(Loss) Reconciliation [Abstract] |  |  |  |
Profit/(loss) for the period | (184,443) | 52,565 | 31,263 |
Additional profit/(loss) if subsidiaries had been accounted for using the equity method of accounting as opposed to cost method | 226,039 | (164,369) | (36,118) |
Equity Reconciliation [Abstract] |  |  |  |
Shareholders equity | 1,769,146 | 2,087,059 | 2,153,420 |
Additional shareholders equity if subsidiaries had been accounted for using the equity method of accounting as opposed to cost method | $ (13,034) | $ (191,606) | $ (194,309) |

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