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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Investments - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Fair value measurements |  |
Sale of a portion of the business |  | $ 15,700
Equity method investments without a readily determinable fair value transferred to the cost method | $ 16,300 |
Investment book value |  | 13,200
Equity method investment, realized gain (loss) |  | 2,500
Reclassification of foreign currency | 1,348 | $ (500)
Equity method investments |  |
Fair value measurements |  |
Income recorded from equity method investments | $ 100 |

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