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Restructuring and Other Related Charges - Narrative (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) employee | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and other related charges |  |  | $ 17,311 | $ 13,310 | $ 0
Contract termination fees |  |  | 5,015 | 3,596 | 0
Write-off of property and equipment, net |  |  | 2,728 | 3,828 | 0
Capitalized software |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Write-off of property and equipment, net | $ 1,500 |  |  |  |
Dealflo Limited | Customer relationships |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Impairment of intangible assets |  |  |  | 3,800 |
Employee Costs |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance Costs |  |  | $ 11,700 | 9,500 |
Number of employees eliminated | employee |  |  | 270 |  |
Restructuring liability, current |  |  | $ 2,600 |  |
Restructuring liability, noncurrent |  |  | 500 |  |
Contract termination fees |  |  | 3,130 | 3,596 | 0
Real Estate Rationalization |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring liability, current |  |  | 1,200 |  |
Restructuring liability, noncurrent |  |  | 700 |  |
Contract termination fees |  |  | 1,885 | 0 | $ 0
Real Estate Rationalization | Chicago Office |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Contract termination fees |  |  | 1,400 |  |
Gain (loss) on rent concession and tenant improvement allowances |  |  | 300 |  |
Write-off of property and equipment, net |  | $ 700 |  |  |
Real Estate Rationalization | Brussels Office |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Contract termination fees |  |  | 300 |  |
Gain (loss) on rent concession and tenant improvement allowances |  |  | (100) |  |
Write-off of property and equipment, net |  | $ 600 |  |  |
Vendor Rationalization |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Payments for restructuring |  |  | 1,200 |  |
Settlement Costs | Brussels Office |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring liability, noncurrent |  |  | 200 |  |
Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and other related charges |  |  | $ 17,300 | $ 13,300 |

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