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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) shares in Thousands, $ in Thousands | Common Shares | Capital in Excess of Par Value | Accumulated Other Comprehensive Income | Retained Earnings | Treasury Shares | Non-controlling Interest | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at the beginning of the period at Dec. 31, 2015 | $ 331 | $ 2,493,100 | $ (47,593) | $ 3,131,134 | $ (1,294,262) | $ 11,158 | $ 4,293,868
Balance (in shares) at Dec. 31, 2015 | 330,526 |  |  |  |  |  |
Increase (Decrease) in Equity |  |  |  |  |  |  |
Net income (loss) |  |  |  | (582,944) |  | (2,175) | (585,119)
Dividends to shareholders |  |  |  | (33,925) |  |  | (33,925)
Repurchase of treasury shares |  |  |  |  | (1,687) |  | (1,687)
Other comprehensive income (loss), net of tax |  |  | 39,343 |  |  | 461 | 39,804
Issuance of common shares for stock options exercised, net of surrender of unexercised stock options |  | 39 |  |  |  |  | 39
Issuance of common shares for stock options exercised (in shares) | 4 |  |  |  |  |  |
Share-based compensation |  | 16,596 |  |  |  |  | 16,596
Other | $ 2 | (4,284) |  |  |  | (2,596) | (6,878)
Other (in shares) | 2,524 |  |  |  |  |  |
Balance at the end of the period at Jun. 30, 2016 | $ 333 | 2,505,451 | (8,250) | 2,514,265 | (1,295,949) | 6,848 | 3,722,698
Balance (in shares) at Jun. 30, 2016 | 333,054 |  |  |  |  |  |
Balance at the beginning of the period at Dec. 31, 2016 | $ 334 | 2,521,332 | (12,119) | 2,033,427 | (1,295,949) | 7,770 | 3,254,795
Balance (in shares) at Dec. 31, 2016 | 333,598 |  |  |  |  |  |
Increase (Decrease) in Equity |  |  |  |  |  |  |
Net income (loss) |  |  |  | (281,935) |  | 2,888 | (279,047)
Dividends to shareholders |  |  |  | (34,307) |  |  | (34,307)
Other comprehensive income (loss), net of tax |  |  | 16,913 |  |  | 157 | 17,070
Issuance of common shares for stock options exercised, net of surrender of unexercised stock options | $ 1 | 8,299 |  |  |  |  | 8,300
Issuance of common shares for stock options exercised (in shares) | 843 |  |  |  |  |  |
Share-based compensation |  | 18,045 |  |  |  |  | 18,045
Equity component of exchangeable debt |  | 116,195 |  |  |  |  | 116,195
Capped call transactions |  | 40,250 |  |  |  |  | 40,250
Adoption of ASU No. 2016-09 |  | 1,943 |  | 5,150 |  |  | 7,093
Noncontrolling interest contribution |  |  |  |  |  | 13,018 | 13,018
Other | $ 1 | (7,845) |  |  |  | (290) | (8,134)
Other (in shares) | 1,058 |  |  |  |  |  |
Balance at the end of the period at Jun. 30, 2017 | $ 336 | $ 2,617,719 | $ 4,794 | $ 1,722,335 | $ (1,295,949) | $ 23,543 | $ 3,072,778
Balance (in shares) at Jun. 30, 2017 | 335,499 |  |  |  |  |  |

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