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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 | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Fully diluted (loss) earnings per share |  |
Net income (loss) from discontinued operations available to common stockholders |  | $ 14,776
Weighted-average shares: |  |
Common stock outstanding | 338,403 | 307,728
Discontinued Operations [Member] |  |
Fully diluted (loss) earnings per share |  |
Net income (loss) from discontinued operations available to common stockholders |  | $ 14,776
Allocations of net income (loss) to limited partnership interests, net of tax |  | 9,113
Net income (loss) for fully diluted shares |  | $ 23,889
Weighted-average shares: |  |
Common stock outstanding |  | 307,728
Partnership units |  | 169,218
RSUs (Treasury stock method) |  | 604
Other |  | 1,385
Fully diluted weighted-average shares of common stock outstanding |  | 478,935
Fully diluted earnings (loss) per share from discontinued operations |  | $ 0.05

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