v3.26.1
FAIR VALUE MEASUREMENT - Schedule of Financial Assets and Liabilities Not Recorded at Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Assets:    
Cash and cash equivalents, and restricted cash and cash equivalents $ 304,423 $ 288,349
Fee receivables 190,470 153,250
Secured borrowing    
Liabilities:    
Long-term debt 254,259 191,983
Exchangeable notes    
Liabilities:    
Long-term debt 253,451 292,445
Long-term debt    
Liabilities:    
Long-term debt 413,647 430,616
Carrying Value    
Assets:    
Cash and cash equivalents, and restricted cash and cash equivalents 304,423 288,349
Fee receivables 190,470 153,250
Carrying Value | Secured borrowing    
Liabilities:    
Long-term debt 252,995 193,892
Carrying Value | Exchangeable notes    
Liabilities:    
Long-term debt 150,070 148,782
Carrying Value | Long-term debt    
Liabilities:    
Long-term debt 471,866 481,598
Fair Value | Level 1    
Assets:    
Cash and cash equivalents, and restricted cash and cash equivalents 304,423 288,349
Fee receivables 0 0
Fair Value | Level 1 | Secured borrowing    
Liabilities:    
Long-term debt 0 0
Fair Value | Level 1 | Exchangeable notes    
Liabilities:    
Long-term debt 0 0
Fair Value | Level 1 | Long-term debt    
Liabilities:    
Long-term debt 0 0
Fair Value | Level 2    
Assets:    
Cash and cash equivalents, and restricted cash and cash equivalents 0 0
Fee receivables 82,763 69,864
Fair Value | Level 2 | Secured borrowing    
Liabilities:    
Long-term debt 0 0
Fair Value | Level 2 | Exchangeable notes    
Liabilities:    
Long-term debt 253,451 292,445
Fair Value | Level 2 | Long-term debt    
Liabilities:    
Long-term debt 413,647 430,616
Fair Value | Level 3    
Assets:    
Cash and cash equivalents, and restricted cash and cash equivalents 0 0
Fee receivables 107,707 83,386
Fair Value | Level 3 | Secured borrowing    
Liabilities:    
Long-term debt 254,259 191,983
Fair Value | Level 3 | Exchangeable notes    
Liabilities:    
Long-term debt 0 0
Fair Value | Level 3 | Long-term debt    
Liabilities:    
Long-term debt $ 0 $ 0