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Description of Business and Summary of Significant Accounting Policies (Details) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 15, 2023 USD ($) | Dec. 31, 2023 USD ($) segment option_to_extend | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Aug. 20, 2018
Description Of Business And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of reportable business segments | segment |  | 5 |  |  |
Advertising costs |  | $ 23.0 | $ 19.4 | $ 13.0 |
Forgivable loans, forgiveness period, minimum |  | 1 year |  |  |
Forgivable loans, forgiveness period, maximum |  | 10 years |  |  |
Definite-lived intangible assets amortization period |  | 8 years 7 months 6 days |  |  |
Number of option to extend | option_to_extend |  | 1 |  |  |
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%
Debt conversion, original debt, amount | $ 315.8 |  |  |  |
Minimum |  |  |  |  |
Description Of Business And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Definite-lived intangible assets amortization period |  | 2 years |  |  |
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 |  |  |
Minimum | 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 |  |  |
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 |  |  |
Maximum | 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) |  | 10 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% |  |  |

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