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Earnings Per Share - Calculation of Fully Diluted Earnings Per Share from Discontinued Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Fully diluted earnings (loss) per share: |  |  |
Net income (loss) from discontinued operations available to common stockholders |  | $ 120,438 | $ 176,278
Weighted-average shares: |  |  |
Common stock outstanding | 344,332 | 322,141 | 287,378
Discontinued Operations [Member] |  |  |
Fully diluted earnings (loss) per share: |  |  |
Net income (loss) from discontinued operations available to common stockholders |  | $ 120,438 | $ 176,278
Net income (loss) for fully diluted shares |  | $ 120,438 | $ 176,278
Weighted-average shares: |  |  |
Common stock outstanding |  | 322,141 | 287,378
RSUs (Treasury stock method) |  | 368 |
Other |  | 1,335 |
Fully diluted weighted-average shares of common stock outstanding |  | 323,844 | 287,378
Fully diluted earnings (loss) per share from discontinued operations |  | $ 0.37 | $ 0.61

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