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Net Income (Loss) Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Computations of Basic and Diluted Income (Loss ) Per Common Share | Basic income or loss per share attributable to common stockholders is computed as (i) income or loss attributable to common stockholders (ii) less income allocable to participating securities (iii) divided by weighted average basic shares outstanding. Diluted income or loss per share attributable to common stockholders is computed as (i) basic income or loss attributable to common stockholders (ii) plus diluted adjustments to income allocable to participating securities (iii) divided by weighted average diluted shares outstanding. Diluted net income (loss) per share is calculated under both the two class method and the treasury stock method and the more dilutive of the two calculations is presented. The following table sets forth a reconciliation of net income or loss to basic income or loss attributable to common stockholders and to diluted income or loss attributable to common stockholders (in thousands except per share amounts):
| Year Ended December 31, |
| 2017 |  |  |  | 2016 |  |  | 2015 |
Net income (loss), as reported | $ | 333,146 |  |  |  | $ | (521,388 | ) |  | $ | (713,685 | )
Participating basic earnings (a) |  | (3,751 | ) |  |  |  | (223 | ) |  |  | (450 | )
Basic net income (loss) attributed to common stockholders |  | 329,395 |  |  |  |  | (521,611 | ) |  |  | (714,135 | )
Reallocation of participating earnings (a) |  | 5 |  |  |  |  | — |  |  |  | — |
Diluted net income (loss) attributed to common stockholders | $ | 329,400 |  |  |  | $ | (521,611 | ) |  | $ | (714,135 | )
Net income (loss) per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic | $ | 1.34 |  |  |  | $ | (2.75 | ) |  | $ | (4.29 | )
Diluted | $ | 1.34 |  |  |  | $ | (2.75 | ) |  | $ | (4.29 | )
| (a) | Restricted stock Liability Awards represent participating securities because they participate in nonforfeitable dividends or distributions with common equity owners. Income allocable to participating securities represents the distributed and undistributed earnings attributable to the participating securities. Participating securities, however, do not participate in undistributed net losses.
Basic Weighted Average Common Shares Outstanding to Diluted Weighted Average Common Shares Outstanding | The following table provides a reconciliation of basic weighted average common shares outstanding to diluted weighted average common shares outstanding (in thousands):
|  | Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Denominator: |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding – basic (1) |  | 245,091 |  |  |  | 189,868 |  |  |  | 166,389 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Director and employee restricted stock and performance-based equity awards |  | 367 |  |  |  | — |  |  |  | — |
Weighted average common shares outstanding – diluted |  | 245,458 |  |  |  | 189,868 |  |  |  | 166,389 |
| (1) | Includes common stock issued in connection with the exchange of 77.0 million shares for all outstanding Memorial common stock on September 16, 2016. |

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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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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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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