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Organization and Basis of Presentation - Schedule of Adjustments to Consolidated Statements of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Income (loss) from operations before income taxes | $ 133,194 | $ 57,794 |
Consolidated net income (loss) | 97,431 | 51,116 | $ 81,729
Net income (loss) attributable to noncontrolling interest in subsidiaries | 38,657 | 14,291 |
Net income (loss) available to common stockholders | $ 58,774 | $ 36,825 |
Basic earnings (loss) per share | $ 0.19 | $ 0.13 |
Diluted earnings (loss) per share | $ 0.19 | $ 0.13 |
As Previously Reported [Member] |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Income (loss) from operations before income taxes |  | $ 28,751 |
Consolidated net income (loss) |  | 22,092 |
Net income (loss) attributable to noncontrolling interest in subsidiaries |  | 3,877 |
Net income (loss) available to common stockholders |  | $ 18,215 |
Basic earnings (loss) per share |  | $ 0.06 |
Diluted earnings (loss) per share |  | $ 0.06 |
Retrospective Adjustments [Member] |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Income (loss) from operations before income taxes |  | $ 29,043 |
Consolidated net income (loss) |  | 29,024 |
Net income (loss) attributable to noncontrolling interest in subsidiaries |  | 10,414 |
Net income (loss) available to common stockholders |  | $ 18,610 |
Basic earnings (loss) per share |  | $ 0.07 |
Diluted earnings (loss) per share |  | $ 0.07 |

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