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Goodwill and Acquired Client Relationships - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
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     24,700,000  
Estimated Future Amortization Expense of Finite-Lived Intangibles        
Finite-lived intangible, future amortization expense, remainder of fiscal year $ 25,000,000   25,000,000  
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     300,000  
Acquired Client Relationships | Intangible amortization and impairments        
Intangible Assets        
Amortization and impairment expenses of intangible assets $ 12,500,000 $ 8,900,000 $ 25,000,000 $ 16,400,000