Unconsolidated Investments - Summarized Operating Results of Unconsolidated Investees (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Equity Method Investments and Joint Ventures [Abstract] | ||||
| Revenue | $ 70,156 | $ 82,744 | $ 179,689 | $ 183,103 |
| Cost of revenue | 29,829 | 28,149 | 60,166 | 57,738 |
| Operating expenses | 34,589 | 919 | 53,743 | 1,633 |
| Other expense | 18,833 | 15,135 | 39,684 | 37,976 |
| Net income (loss) | $ (13,095) | $ 38,541 | $ 26,096 | $ 85,756 |