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Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Gross $ 1,052,023 $ 1,034,751
Accumulated Amortization (1,017,764) (1,015,963)
Net $ 34,259 $ 18,788
Weighted average remaining amortization period in years (in years) 7 years 4 months 24 days 1 year 4 months 24 days
Client relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross $ 818,781 $ 799,882
Accumulated Amortization (790,891) (787,736)
Net $ 27,890 $ 12,146
Weighted average remaining amortization period in years (in years) 7 years 4 months 24 days 1 year 4 months 24 days
Trademarks and domain names    
Finite-Lived Intangible Assets [Line Items]    
Gross $ 228,021 $ 224,423
Accumulated Amortization (221,936) (220,886)
Net $ 6,085 $ 3,537
Weighted average remaining amortization period in years (in years) 7 years 4 months 24 days 1 year 10 months 24 days
Covenants not to compete    
Finite-Lived Intangible Assets [Line Items]    
Gross $ 5,221 $ 10,446
Accumulated Amortization (4,937) (7,341)
Net $ 284 $ 3,105
Weighted average remaining amortization period in years (in years) 6 months 9 months 18 days