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Operating leases | 9 Months Ended
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Sep. 30, 2023
Leases [Abstract] |
Operating leases | Operating leases Lease costs recorded under operating leases for the three and nine months ended September 30, 2023 and September 30, 2022 were as follows:
| Three Months Ended | Nine Months Ended |
| September 30, 2023 | September 30, 2022 | September 30, 2023 | September 30, 2022 |
| (in thousands) | (in thousands) |
Operating lease costs | 11,850 |  | 12,164 |  | $ | 37,539 |  | $ | 40,976 |  |
Income from sub-leases | (284) |  | (268) |  | (845) |  | (898) |  |
Net operating lease costs | 11,566 |  | 11,896 |  | $ | 36,694 |  | $ | 40,078 |  |
Of the total cost of $36.7 million incurred in the nine months ended September 30, 2023 (September 30, 2022: $40.1 million), $28.1 million (September 30, 2022: $38.1 million) is recorded within selling, general and administration costs and $8.6 million (September 30, 2022: $2.0 million) is recorded within direct costs. During the nine months ended September 30, 2023 and September 30, 2022, costs incurred by the Group related to variable lease payments was de minimis. Right-of-use assets obtained, in exchange for lease obligations during the three months ended September 30, 2023, totaled $2.1 million (September 30, 2022: $1.7 million). Right-of-use assets obtained, in exchange for lease obligations during the nine months ended September 30, 2023, totaled $24.6 million (September 30, 2022: $37.6 million). The weighted average remaining lease term and weighted-average discount rate at September 30, 2023 were 6.75 years and 3.15%, respectively. Future minimum lease payments under non-cancelable leases as of September 30, 2023 were as follows:
| Minimum rental payments |
(in thousands) | September 30, 2023 |
Year 1 | $ | 38,084 |  |
Year 2 | 31,545 |  |
Year 3 | 26,709 |  |
Year 4 | 21,934 |  |
Year 5 | 15,039 |  |
Thereafter | 35,884 |  |
Total future minimum lease payments | 169,195 |  |
Lease imputed interest | (13,883) |  |
Total | $ | 155,312 |  |
Operating lease liabilities are presented as current and non-current. Operating lease liabilities of $33.9 million have been included in other liabilities as at September 30, 2023 (September 30, 2022: $42.2 million).

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//842-20/tableOfContent + Details
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