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Accounts receivable, unbilled revenue (contract assets) and unearned revenue or payments on account (contract liabilities) (Tables) | 9 Months Ended
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Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Accounts Receivables and Unbilled Revenue, and Unbilled Services and Unearned Revenue | Accounts receivables and unbilled revenue are as follows:
| September 30, 2025 | December 31, 2024
| (in thousands)
Billed services (accounts receivable) | $ | 1,427,376 |  | $ | 1,437,653 |
Allowance for credit losses | (39,686) |  | (35,664) |
Accounts receivable net | 1,387,690 |  | 1,401,989 |
Unbilled services (unbilled revenue) | 1,258,706 |  | 1,286,274 |
Accounts receivable and unbilled revenue, net | $ | 2,646,396 |  | $ | 2,688,263 |
Unbilled services and unearned revenue or payments on account (contract assets and liabilities) were as follows:
| September 30, 2025 | December 31, 2024 | $ Change | % Change
| (in thousands, except percentages)
Unbilled services (unbilled revenue) | $ | 1,258,706 |  | $ | 1,286,274 |  | $ | (27,568) |  | (2.1) | %
Unearned revenue (payments on account) | (1,528,343) |  | (1,614,758) |  | 86,415 |  | (5.4) | %
Net balance | $ | (269,637) |  | $ | (328,484) |  | $ | 58,847 |  | (17.9) | %

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- References No definition available. + Details
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