Capital Stock	12 Months Ended
Dec. 31, 2015
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 8 — Debt and Note 11 — 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 and our 6.00% tangible equity units. 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. At year-end 2015, personnel of former affiliates held options to purchase 500,798 shares of our common stock. The options have a weighted average exercise price of $28.62 and a weighted average remaining contractual term of one year. At year-end 2015, the options have an aggregate intrinsic value of $0. In 2015, we did not repurchase shares of our common stock. In 2014, we repurchased 1,491,187 shares of our common stock for $24,595,000. We have repurchased 3,493,332 shares of our common stock for $54,159,000 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 8 — Debt and Note 11 — 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 and our 6.00% tangible equity units.

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.

At year-end 2015, personnel of former affiliates held options to purchase 500,798 shares of our common stock. The options have a weighted average exercise price of $28.62 and a weighted average remaining contractual term of one year. At year-end 2015, the options have an aggregate intrinsic value of $0.

In 2015, we did not repurchase shares of our common stock. In 2014, we repurchased 1,491,187 shares of our common stock for $24,595,000. We have repurchased 3,493,332 shares of our common stock for $54,159,000 since we announced our 2009 strategic initiative of repurchasing up to 20 percent or up to 7,000,000 shares of our common stock.