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MAINLAND CHINA CONTRIBUTION PLAN AND PROFIT APPROPRIATION (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
MAINLAND CHINA CONTRIBUTION PLAN AND PROFIT APPROPRIATION |  |  |
Defined contribution plan expenses | $ 19.3 | $ 16.4 | $ 10.0
Aggregate balance of statutory common reserves | 172.3 | $ 171.7 | $ 171.7
Restrictions of statutory reserves | $ 3,228.8 |  |

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