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Description of Business and Summary of Significant Accounting Policies (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
segment
option_to_extend
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Aug. 20, 2018
Description Of Business And Summary Of Significant Accounting Policies [Line Items]        
Number of reportable business segments | segment 5      
Advertising costs $ 19,400 $ 13,000 $ 15,200  
Forgivable loans, forgiveness period, minimum 1 year      
Forgivable loans, forgiveness period, maximum 10 years      
Definite-lived intangible assets amortization period 12 years 2 months 12 days      
Number of option to extend | option_to_extend 1      
Aggregate principal amount $ 316,219 316,245    
2023 Convertible Notes        
Description Of Business And Summary Of Significant Accounting Policies [Line Items]        
Aggregate principal amount $ 316,219 $ 316,245    
Senior Notes | 2023 Convertible Notes        
Description Of Business And Summary Of Significant Accounting Policies [Line Items]        
Interest rate (as a percent) 2.00%     2.00%
Aggregate principal amount $ 1      
Software and Software Development Costs        
Description Of Business And Summary Of Significant Accounting Policies [Line Items]        
Estimated useful of furniture, equipment and internal use software (in years) 3 years      
Minimum        
Description Of Business And Summary Of Significant Accounting Policies [Line Items]        
Definite-lived intangible assets amortization period 1 year      
Minimum | Furniture, Equipment, And Internal-Use Software        
Description Of Business And Summary Of Significant Accounting Policies [Line Items]        
Estimated useful of furniture, equipment and internal use software (in years) 1 year      
Maximum        
Description Of Business And Summary Of Significant Accounting Policies [Line Items]        
Definite-lived intangible assets amortization period 15 years      
Lessee renewal term 7 years      
Maximum | Furniture, Equipment, And Internal-Use Software        
Description Of Business And Summary Of Significant Accounting Policies [Line Items]        
Estimated useful of furniture, equipment and internal use software (in years) 11 years      
Non U.S | Geographic Concentration Risk | Consolidated Revenues        
Description Of Business And Summary Of Significant Accounting Policies [Line Items]        
Revenue from the work of professionals 37.00%