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Earnings (loss) per common share | 3 Months Ended
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Mar. 31, 2016
Earnings Per Share [Abstract] |
Earnings (loss) per common share | Earnings (loss) per common share Basic earnings (loss) per common share were computed by dividing earnings (loss) on common stock by the weighted average number of shares of common stock outstanding during the applicable period. Diluted earnings (loss) per common share were computed by dividing earnings (loss) on common stock by the total of the weighted average number of shares of common stock outstanding during the applicable period, plus the effect of outstanding performance share awards. Common stock outstanding includes issued shares less shares held in treasury. Net income (loss) was the same for both the basic and diluted earnings (loss) per share calculations. A reconciliation of the weighted average common shares outstanding used in the basic and diluted earnings (loss) per share calculations was as follows:
| Three Months Ended
| March 31,
| 2016 |  | 2015 |
| (In thousands)
Weighted average common shares outstanding - basic | 195,284 |  | 194,479 |
Effect of dilutive performance share awards | — |  | 87 |
Weighted average common shares outstanding - diluted | 195,284 |  | 194,566 |
Shares excluded from the calculation of diluted earnings per share | — |  | — |

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