ACQUISITIONS AND INTANGIBLE ASSETS, NET - Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]    
Total Intangible Assets $ 2,776,220 $ 2,725,300
Less: accumulated amortization (240,300) (113,889)
Total Intangible Assets, Net 2,535,920 2,611,411
Investment management agreements    
Acquired Finite-Lived Intangible Assets [Line Items]    
Total Intangible Assets $ 2,222,320 2,183,200
Remaining Weighted-Average Amortization Period 12 years 10 months 24 days  
Investment management agreements | Minimum    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 1 month 6 days  
Investment management agreements | Maximum    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 20 years  
Investor relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Total Intangible Assets $ 459,500 448,800
Remaining Weighted-Average Amortization Period 6 years 1 month 6 days  
Investor relationships | Minimum    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 7 years 9 months 18 days  
Investor relationships | Maximum    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 13 years  
Trademarks    
Acquired Finite-Lived Intangible Assets [Line Items]    
Total Intangible Assets $ 94,400 $ 93,300
Remaining Weighted-Average Amortization Period 10 years 2 months 12 days  
Trademarks | Minimum    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 7 years  
Trademarks | Maximum    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life (in years) 7 years