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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) |  |  |  | (694,155) |  | (990) | (695,145)
Dividends to shareholders ($0.18 per share) |  |  |  | (50,926) |  |  | (50,926)
Repurchase of treasury shares |  |  |  |  | (1,687) |  | (1,687)
Other comprehensive income (loss), net of tax |  |  | 35,668 |  |  | 371 | 36,039
Issuance of common shares for stock options exercised, net of surrender of unexercised stock options |  | 562 |  |  |  |  | 562
Issuance of common shares for stock options exercised (in shares) | 57 |  |  |  |  |  |
Share-based compensation |  | 24,070 |  |  |  |  | 24,070
Other | $ 2 | (4,315) |  |  |  | (3,774) | (8,087)
Other (in shares) | 2,424 |  |  |  |  |  |
Balance at the end of the period at Sep. 30, 2016 | $ 333 | 2,513,417 | (11,925) | 2,386,053 | (1,295,949) | 6,765 | 3,598,694
Balance (in shares) at Sep. 30, 2016 | 333,007 |  |  |  |  |  |
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) |  |  |  | (430,467) |  | 5,001 | (425,466)
Dividends to shareholders ($0.18 per share) |  |  |  | (51,460) |  |  | (51,460)
Other comprehensive income (loss), net of tax |  |  | 27,776 |  |  | 317 | 28,093
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 |  | 25,057 |  |  |  |  | 25,057
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 contributions (distributions) |  |  |  |  |  | 12,728 | 12,728
Other | $ 1 | (7,865) |  |  |  |  | (7,864)
Other (in shares) | 1,109 |  |  |  |  |  |
Balance at the end of the period at Sep. 30, 2017 | $ 336 | $ 2,624,711 | $ 15,657 | $ 1,556,650 | $ (1,295,949) | $ 25,816 | $ 2,927,221
Balance (in shares) at Sep. 30, 2017 | 335,550 |  |  |  |  |  |

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