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Earnings (Loss) Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Schedule of Weighted-Average Number of Shares Outstanding | The following table summarizes the basic and diluted weighted average common shares outstanding and the weighted average common shares excluded from the calculation of diluted weighted average common shares outstanding due to the anti-dilutive effect for the periods presented (in thousands):
| Successor |  |  | Predecessor
| Period from November 20, 2020 through December 31, 2020 |  |  | Period from January 1, 2020 through November 19, 2020 |  | Year Ended December 31,
|  |  |  | 2019 |  | 2018
Weighted average common shares outstanding: |  |  |  |  |  |  |  |
Basic and diluted | 19,991 |  |  |  | 317,644 |  |  | 315,002 |  |  | 307,480 |
Anti-dilutive weighted average common shares: |  |  |  |  |  |  |  |
Unvested restricted stock awards and PSUs | 9 |  |  |  | 5,216 |  |  | 9,242 |  |  | 6,980 |

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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://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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