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Goodwill and Acquired Client Relationships - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Intangible Assets        
Goodwill impairment     $ 0  
Acquired Client Relationships        
Estimated Future Amortization Expense of Finite-Lived Intangibles        
Intangible impairments     0  
Acquired Client Relationships        
Intangible Assets        
Amortization and impairment expenses of intangible assets     36,900,000  
Estimated Future Amortization Expense of Finite-Lived Intangibles        
Finite-lived intangible, future amortization expense, remainder of fiscal year $ 12,000,000   12,000,000  
Finite-lived intangible, future amortization expense in year one 50,000,000   50,000,000  
Finite-lived intangible, future amortization expense in year two 35,000,000   35,000,000  
Finite-lived intangible, future amortization expense in year three 35,000,000   35,000,000  
Finite-lived intangible, future amortization expense in year four 35,000,000   35,000,000  
Finite-lived intangible, future amortization expense in year five 35,000,000   35,000,000  
Intangible impairments     2,500,000  
Acquired Client Relationships | Intangible amortization and impairments        
Intangible Assets        
Amortization and impairment expenses of intangible assets $ 12,200,000 $ 8,900,000 $ 36,900,000 $ 25,300,000