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Earnings (Loss) Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Calculation of Earnings Per Share | The following table sets forth the calculation of EPS for the years ended December 31, 2018, 2017, and 2016 (in thousands, except per share amounts):
|  | Years Ended December 31,
|  | 2018 |  | 2017 |  | 2016
Weighted average basic common shares outstanding |  | 19,453 |  |  | 20,420 |  |  | 21,161 |
Dilutive effect of employee stock purchases, net of assumed repurchase of treasury stock |  | 8 |  |  | 5 |  |  | 9 |
Weighted average dilutive common shares outstanding |  | 19,461 |  |  | 20,425 |  |  | 21,170 |
Basic: |  |  |  |  |  |
Net income (loss) |  | $ | 157,772 |  |  | $ | 213,442 |  |  | $ | 147,065 |
Less: Earnings (loss) allocated to participating securities |  | 5,416 |  |  | 7,512 |  |  | 5,871 |
Earnings (loss) available to basic common shares |  | $ | 152,356 |  |  | $ | 205,930 |  |  | $ | 141,194 |
Basic earnings (loss) per common share |  | $ | 7.83 |  |  | $ | 10.08 |  |  | $ | 6.67 |
Diluted: |  |  |  |  |  |
Net income (loss) |  | $ | 157,772 |  |  | $ | 213,442 |  |  | $ | 147,065 |
Less: Earnings (loss) allocated to participating securities |  | 5,414 |  |  | 7,511 |  |  | 5,869 |
Earnings (loss) available to diluted common shares |  | $ | 152,358 |  |  | $ | 205,931 |  |  | $ | 141,196 |
Diluted earnings (loss) per common share |  | $ | 7.83 |  |  | $ | 10.08 |  |  | $ | 6.67 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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