Capital Stock	12 Months Ended
Dec. 31, 2016
Equity [Abstract]
Capital Stock	Capital Stock In 2015, we accelerated the expiration date of our shareholder rights plan from December 11, 2017 to March 13, 2015, resulting in termination of the plan. Please read Note 12 — Net Income (Loss) per Share for information about shares of common stock that could be issued under our 3.75% convertible senior notes due 2020. Please read Note 17 — Share-Based and Long-Term Incentive Compensation for information about additional shares of common stock that could be issued under terms of our share-based compensation plans. Please read Note 21 — Subsequent Events for information about preferred stock purchase rights pursuant to our tax benefits preservation plan. At year-end 2016, personnel of former affiliates held options to purchase 234,764 shares of our common stock. The options have a weighted average exercise price of $30.56 and will expire in February 2017. At year-end 2016, the options have an aggregate intrinsic value of $0. On December 15, 2016, we issued 7,857,000 shares of our common stock upon settlement of the stock purchase contract related to the 6.00% tangible equity units. In 2016, we repurchased 283,976 shares of our common stock for $3,537,000. In 2014, we repurchased 1,491,187 shares of our common stock for $24,595,000. We have repurchased 3,777,308 shares of our common stock for $57,696,000 since we announced our 2009 strategic initiative of repurchasing up to 20 percent or up to 7,000,000 shares of our common stock.

Capital Stock

In 2015, we accelerated the expiration date of our shareholder rights plan from December 11, 2017 to March 13, 2015, resulting in termination of the plan.

Please read Note 12 — Net Income (Loss) per Share for information about shares of common stock that could be issued under our 3.75% convertible senior notes due 2020.

Please read Note 17 — Share-Based and Long-Term Incentive Compensation for information about additional shares of common stock that could be issued under terms of our share-based compensation plans.

Please read Note 21 — Subsequent Events for information about preferred stock purchase rights pursuant to our tax benefits preservation plan.

At year-end 2016, personnel of former affiliates held options to purchase 234,764 shares of our common stock. The options have a weighted average exercise price of $30.56 and will expire in February 2017. At year-end 2016, the options have an aggregate intrinsic value of $0.

On December 15, 2016, we issued 7,857,000 shares of our common stock upon settlement of the stock purchase contract related to the 6.00% tangible equity units. In 2016, we repurchased 283,976 shares of our common stock for $3,537,000. In 2014, we repurchased 1,491,187 shares of our common stock for $24,595,000. We have repurchased 3,777,308 shares of our common stock for $57,696,000 since we announced our 2009 strategic initiative of repurchasing up to 20 percent or up to 7,000,000 shares of our common stock.