FAIR VALUE MEASUREMENT - Schedule of Assets Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets
Cash, cash equivalents and restricted cash	$ 267,926	$ 222,541
Fees and other receivables	126,447	113,707
Total assets	394,373	336,248
Carrying Value
Assets
Cash, cash equivalents and restricted cash	267,926	222,541
Fees and other receivables	126,447	113,707
Total assets	394,373	336,248
Fair Value | Level 1
Assets
Cash, cash equivalents and restricted cash	267,926	222,541
Fees and other receivables	0	0
Total assets	267,926	222,541
Fair Value | Level 2
Assets
Cash, cash equivalents and restricted cash	0	0
Fees and other receivables	126,447	113,707
Total assets	126,447	113,707
Fair Value | Level 3
Assets
Cash, cash equivalents and restricted cash	0	0
Fees and other receivables	0	0
Total assets	$ 0	$ 0