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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share Reconciliation [Abstract] |
Earnings Per Share Reconciliation | Basic and diluted EPS calculations are detailed as follows (in th ousands, except per share data):
|  |  |  | Year Ended December 31, 2017
|  |  |  | Net Income |  | Weighted-Average Shares |  | Per Share
|  |  |  | (Numerator) |  | (Denominator) |  | Amount
Net income per basic common share |  | $ | 20,311 |  | 79,793 |  | $ | 0.25
Effect of dilutive stock option, restricted |  |  |  |  |  |  |  |
| stock, performance stock unit and |  |  |  |  |  |  |  |
| restricted stock unit securities |  |  | - |  | 811 |  |  | -
Net income per diluted common share |  | $ | 20,311 |  | 80,604 |  | $ | 0.25
|  |  |  | Year Ended December 31, 2016
|  |  |  | Net Income |  | Weighted-Average Shares |  | Per Share
|  |  |  | (Numerator) |  | (Denominator) |  | Amount
Net income per basic common share |  | $ | 521,503 |  | 80,786 |  | $ | 6.46
Effect of dilutive stock option, restricted |  |  |  |  |  |  |  |
| stock, performance stock unit and |  |  |  |  |  |  |  |
| restricted stock unit securities |  |  | - |  | 631 |  |  | (0.05)
Net income per diluted common share |  | $ | 521,503 |  | 81,417 |  | $ | 6.41
|  |  |  | Year Ended December 31, 2015
|  |  |  | Net Income |  | Weighted-Average Shares |  | Per Share
|  |  |  | (Numerator) |  | (Denominator) |  | Amount
Net income per basic common share |  | $ | 469,053 |  | 82,336 |  | $ | 5.70
Effect of dilutive stock option, restricted |  |  |  |  |  |  |  |
| stock and restricted stock unit securities |  |  | - |  | 751 |  |  | (0.05)
Net income per diluted common share |  | $ | 469,053 |  | 83,087 |  | $ | 5.65

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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