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CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (SUMMARY OF CHANGES) (UNAUDITED) - USD ($)
$ in Thousands
Total
Shares
Common Stock
Paid-in Additional Capital
Retained Earnings
Translation Differences
Other Reserves
Total Equity
Balance at beginning of period at Dec. 31, 2016   $ 93,433,804 $ 934 $ 881,097 $ (205,195) $ (108) $ 8,283 $ 685,011
Net income/(loss) after tax $ 14,115       14,115     14,115
Other comprehensive income 141         141   141
Total comprehensive income 14,256       14,115 141   14,256
Cash dividends declared and paid         (20,481)     (20,481)
Issuance of convertible bonds 0              
Issuance of stock   47,724,395 477 254,546       255,024
Purchase of convertible bonds (17,104)     (2,213)       (2,213)
Compensation related to options and restricted stock   1,189,099 12 7,173     (3,138) 4,047
Balance at end of period at Sep. 30, 2017   142,347,298 1,423 1,140,604 (211,560) 33 5,145 935,645
Balance at beginning of period (Restated [member]) at Dec. 31, 2017   142,417,407 1,424 1,140,794 (226,821) 85 5,676 921,158
Balance at beginning of period (Previously stated [member]) at Dec. 31, 2017   142,417,407 1,424 1,140,794 (222,087) 85 5,676 925,892
Balance at beginning of period (Increase (decrease) due to changes in accounting policy required by IFRSs [member]) at Dec. 31, 2017         (4,734)     (4,734)
Balance at beginning of period at Dec. 31, 2017 925,892              
Net income/(loss) after tax (58,910)       (58,910)     (58,910)
Other comprehensive income 63         (63)   (63)
Total comprehensive income (58,847)       (58,910) (63)   (58,974)
Cash dividends declared and paid         (8,615)     (8,615)
Issuance of convertible bonds 39,346     3,165       3,165
Purchase of convertible bonds 0     (1,613)       (1,613)
Compensation related to options and restricted stock   1,175,136 12 6,414     (4,161) 2,264
Balance at end of period at Sep. 30, 2018 $ 857,387 $ 143,592,543 $ 1,436 $ 1,148,761 $ (294,346) $ 22 $ 1,514 $ 857,387