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Selected Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Selected Quarterly Financial Data | Provided below are selected unaudited quarterly financial data for 2017 and 2016. The earnings per share information is calculated independently for each quarter based on the weighted average number of common stock and common stock equivalents outstanding, which may fluctuate, based on quarterly income levels and market prices. Therefore and due to the seasonality of the Company’s earnings, the sum of the quarters’ per share information may not equal the annual amount presented on the Consolidated Statements of Operations.
|  |  | 2017
|  |  | First |  | Second |  | Third |  | Fourth (a)
Net revenues | $ | 1,839 |  |  | $ | 2,238 |  |  | $ | 2,752 |  |  | $ | 2,019 |
Net income (loss) | (107 | ) |  | 3 |  |  | 245 |  |  | 220 |
Per share information: |  |  |  |  |  |  |
| Basic |  |  |  |  |  |  |
|  | Net income (loss) | $ | (1.25 | ) |  | $ | 0.04 |  |  | $ | 2.96 |  |  | $ | 2.70 |
|  | Weighted average shares | 85.7 |  |  | 84.0 |  |  | 82.6 |  |  | 81.3 |
| Diluted |  |  |  |  |  |  |
|  | Net income (loss) | $ | (1.25 | ) |  | $ | 0.04 |  |  | $ | 2.91 |  |  | $ | 2.65 |
|  | Weighted average shares | 85.7 |  |  | 85.2 |  |  | 84.0 |  |  | 82.7 |
|  |  | 2016
|  |  | First |  | Second |  | Third |  | Fourth
Net revenues | $ | 1,881 |  |  | $ | 2,243 |  |  | $ | 2,656 |  |  | $ | 1,879 |
Net income (loss) | (51 | ) |  | 36 |  |  | 209 |  |  | (31 | )
Per share information: |  |  |  |  |  |  |
| Basic |  |  |  |  |  |  |
|  | Net income (loss) | $ | (0.53 | ) |  | $ | 0.39 |  |  | $ | 2.32 |  |  | $ | (0.35 | )
|  | Weighted average shares | 96.3 |  |  | 93.9 |  |  | 90.4 |  |  | 87.4 |
| Diluted |  |  |  |  |  |  |
|  | Net income (loss) | $ | (0.53 | ) |  | $ | 0.38 |  |  | $ | 2.28 |  |  | $ | (0.35 | )
|  | Weighted average shares | 96.3 |  |  | 95.1 |  |  | 91.8 |  |  | 87.4 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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