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Leases - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2023 | Dec. 31, 2022
Lessee, Lease, Description [Line Items] |  |  |
Weighted average remaining lease term | 4 years 6 months | 4 years 6 months |
Weighted-average discount rate | 5.00% | 5.00% |
Cash payments to settle a lease liability reported in cash flows |  | $ 2,200 |
Right-of-use assets obtained in exchange for new lease liabilities |  | 600 |
Contract termination fees | $ 4,510 | 4,510 | $ 3,596
Real Estate Rationalization |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Contract termination fees | 1,690 | 1,690 | $ 0
Chicago Office | Real Estate Rationalization |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Contract termination fees | 1,400 | 1,400 |
Gain (loss) on rent concession and tenant improvement allowances |  | 300 |
Brussels Office | Real Estate Rationalization |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Contract termination fees | 300 | 300 |
Gain (loss) on rent concession and tenant improvement allowances | $ (600) | $ (600) |

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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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