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Joint Ventures - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Assets: |  |  |  |
Cash | $ 2,809,782 | $ 1,160,804 | $ 732,248 | $ 689,557
Liabilities and equity: |  |  |  |
Equity | 3,103,074 | 2,341,244 | $ 1,808,562 | $ 1,605,492
Total liabilities and shareholders' equity | 5,777,141 | 3,809,815 |  |
Consolidated Joint Venture |  |  |  |
Assets: |  |  |  |
Cash | 269 | $ 281 |  |
Liabilities and equity: |  |  |  |
Accrued expenses | $ 244 |  |  |

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