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Organization and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019 | Jan. 01, 2019
--- | --- | --- | --- | --- | --- | --- | --- | ---
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Operating lease ROU assets | $ 140,607 |  | $ 165,969 |  |  |  |  |
Operating lease liabilities | 170,155 |  | 190,207 |  |  |  |  |
Assets | (5,133,479) |  | (3,949,300) |  |  |  |  |
Noncontrolling interest in subsidiaries | (789,345) | $ (870,422) | (808,229) | $ (742,760) | $ (696,324) |  | $ (724,968) |
Retained deficit | 1,211,870 |  | 1,265,504 |  |  |  |  |
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Operating lease ROU assets |  |  |  |  |  |  |  | $ 192,400
Operating lease liabilities |  |  |  |  |  |  |  | $ 206,000
Noncontrolling interest in subsidiaries |  |  |  |  |  |  | 1,300 |
Assets | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Assets |  |  |  |  |  | $ 1,900 |  |
Tax effect impact for increase or decrease to the liability |  |  |  |  |  | 600 |  |
Noncontrolling Interest in Subsidiaries |  |  |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest in subsidiaries | (66,435) | (77,690) | (59,290) | (57,001) | (48,349) |  | (50,321) |
Noncontrolling Interest in Subsidiaries | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest in subsidiaries |  |  |  |  |  | 600 | 417 |
Tax effect impact for increase or decrease to the liability |  |  |  |  |  | 200 |  |
Retained Deficit |  |  |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest in subsidiaries | $ 1,211,870 | $ 1,226,187 | $ 1,265,504 | $ 1,265,589 | $ 1,289,931 |  | 1,253,089 |
Retained Deficit | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Noncontrolling interest in subsidiaries |  |  |  |  |  |  | $ 883 |
Retained deficit |  |  |  |  |  | 1,300 |  |
Tax effect impact for increase or decrease to the liability |  |  |  |  |  | $ 400 |  |

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