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DESCRIPTION OF BUSINESS AND ORGANIZATION - Summarized Income and Cash Flow Statement (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
VIEs        
Net loss attributable to ordinary shareholders   $ (742,001) $ (723,921) $ (110,531)
Net cash used in operating activities   (386,932) (351,419) (126,505)
Net cash (used in) provided by investing activities   (197,985) (149,414) 244,476
Net cash provided by financing activities   284,708 758,131 364,853
Cash and restricted cash at beginning of the year $ 739,533 739,533 531,452 45,685
Cash and restricted cash at end of the year   427,135 739,533 531,452
VIEs        
VIEs        
Net loss attributable to ordinary shareholders (74,137)   (52,431) (8,737)
Net cash used in operating activities (8,281)   (8,869) (7,993)
Net cash (used in) provided by investing activities (38,400)   (5,630)  
Net cash provided by financing activities (107,317)   137,876 55,951
Effect of exchange rate changes on cash (2,573)   (15,900) 1,136
Net increase in cash (156,571)   107,477 49,094
Cash and restricted cash at beginning of the year 156,571 $ 156,571 49,094  
Cash and restricted cash at end of the year     156,571 49,094
VIEs | Consolidation, eliminations        
VIEs        
Other expenses 56,752   0 0
Net cash used in operating activities 88,423   3,348 0
Net cash provided by operating activities 86,697   34 0
Net cash used in financing activities 158,509   10,611 11,055
Net cash provided by financing activities $ 32,715   $ 0 $ 0