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Earnings Per Share (Text Block) | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | Earnings Per Share The following table sets forth the computation of basic and diluted earnings (loss) per share (EPS):
| Three Months Ended March 31,
| 2018 |  | 2017
| (in thousands, except per share data)
Net income (loss) available to common shareholders | $ | (145,666 | ) |  | $ | 15,845 |
Weighted average common shares outstanding - Basic | 38,945 |  |  | 38,474 |
Dilutive effect of stock-based awards | — |  |  | 741 |
Weighted average common shares outstanding - Diluted | 38,945 |  |  | 39,215 |
Earnings (loss) per common share - Basic | $ | (3.74 | ) |  | $ | 0.41 |
Earnings (loss) per common share - Diluted | $ | (3.74 | ) |  | $ | 0.40 |
Stock-based Awards For stock-based awards, the dilutive effect is calculated using the treasury stock method. Under this method, the dilutive effect is computed as if the awards were exercised at the beginning of the period (or at time of issuance, if later) and assumes the related proceeds were used to repurchase common stock at the average market price during the period. Related proceeds include the amount the employee must pay upon exercise and the future compensation cost associated with the stock award. Approximately 1.0 million and 0.2 million stock-based awards were excluded from the calculation of diluted EPS for the three months ended March 31, 2018 and 2017 because they were anti-dilutive. As a result of our net loss for the three months ended March 31, 2018, there was no dilutive effect to weighted average common shares outstanding.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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