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Investments - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of Investments [Line Items] |  |  |
Realized (loss) gain on trading securities | $ 5,000 | $ 4,700 | $ 800
Distributions from equity method investments | 3,710 | $ 1,192 | $ 828
Capital commitments |  |  |
Schedule of Investments [Line Items] |  |  |
Future capital commitment (up to) | $ 100 |  |

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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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