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Investments - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of Investments [Line Items] |  |  |
Equity method investments | $ 32,847 | $ 37,659 |
Gains (losses) on equity method investments | 6,706 | 5,023 | $ 4,115
Impairment charge on equity method investments | 0 | 3,900 | 0
Equity method investment, amount sold | 3,800 | 0 | 0
Investments carried under measurement alternative | 192 | 349 |
Equity investments carried under measurement alternative, loss | 0 | 0 | 0
Equity investments carried under measurement alternative, gain | 0 | 0 | 0
Impairments related to investments | 0 | 0 | 0
Total assets | 3,342,166 | 3,953,242 |
Total liabilities | 2,660,090 | 3,121,271 |
Maximum Exposure to Loss | 4,500 | 4,800 |
Other Nonoperating Income (Expense) |  |  |
Schedule of Investments [Line Items] |  |  |
Investments carried under measurement alternative |  | 400 |
Equity investments carried under measurement alternative, loss | 100 | 400 |
Equity investments carried under measurement alternative, gain |  |  | $ 18,200
Variable Interest Entity, Primary Beneficiary |  |  |
Schedule of Investments [Line Items] |  |  |
Total assets | 6,800 | 7,200 |
Total liabilities | $ 1,300 | $ 1,000 |

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