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Operating leases - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Lessee, Lease, Description [Line Items] |  |  |
Total lease cost | $ 10,431 | $ 12,827 |
Right-of-use assets obtained in exchange for lease obligations | $ 7,000 | 35,600 |
Weighted average remaining lease term | 6 years 3 months 29 days |  | 6 years 6 months 21 days
Weighted average discount rate | 3.93% |  | 4.01%
Operating lease liabilities, current | $ 36,400 |  | $ 36,800
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Other Liabilities |  | Other Liabilities
Operating lease liabilities, non-current | $ 138,354 |  | $ 140,085
Selling, general and administration costs |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Total lease cost | 8,900 | 10,000 |
Direct costs |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Total lease cost | $ 1,500 | $ 2,800 |

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