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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 receivable and unbilled revenue were as follows for the periods ended:
| March 31, 2025 (As Restated) | June 30, 2025 (As Restated) | September 30, 2025 (As Restated)
| (in thousands)
Accounts receivable (Billed services) | $ | 1,426,035 |  | $ | 1,411,329 |  | $ | 1,427,376 |
Allowance for credit losses | (38,573) |  | (44,074) |  | (39,686) |
Accounts receivable (net) | 1,387,462 |  | 1,367,255 |  | 1,387,690 |
Unbilled revenue (Unbilled services) | 1,101,511 |  | 1,173,021 |  | 1,195,747 |
Accounts receivable and unbilled revenue, net | $ | 2,488,973 |  | $ | 2,540,276 |  | $ | 2,583,437 |
| March 31, 2024 (As Restated) | June 30, 2024 (As Restated) | September 30, 2024 (As Restated)
| (in thousands)
Accounts receivable (Billed services) | $ | 1,737,822 |  | $ | 1,608,774 |  | $ | 1,431,581 |
Allowance for credit losses | (35,303) |  | (40,122) |  | (35,501) |
Accounts receivable (net) | 1,702,519 |  | 1,568,652 |  | 1,396,080 |
Unbilled revenue (Unbilled services) | 949,567 |  | 1,021,519 |  | 1,118,860 |
Accounts receivable and unbilled revenue, net | $ | 2,652,086 |  | $ | 2,590,171 |  | $ | 2,514,940 |
| March 31, 2023 (As Restated) | June 30, 2023 (As Restated) | September 30, 2023 (As Restated)
| (in thousands)
Accounts receivable (Billed services) | $ | 1,838,875 |  | $ | 1,788,140 |  | $ | 1,883,296 |
Allowance for credit losses | (36,149) |  | (29,029) |  | (32,934) |
Accounts receivable (net) | 1,802,726 |  | 1,759,111 |  | 1,850,362 |
Unbilled revenue (Unbilled services) | 880,412 |  | 902,321 |  | 828,453 |
Accounts receivable and unbilled revenue, net | $ | 2,683,138 |  | $ | 2,661,432 |  | $ | 2,678,815 |
Unbilled services and unearned revenue or payments on account (contract assets and liabilities) were as follows for the periods ended:
| March 31, 2025 (As Restated) | June 30, 2025 (As Restated) | September 30, 2025 (As Restated) |  |
| (in thousands)
Unbilled revenue (Unbilled services) | $ | 1,101,511 |  | $ | 1,173,021 |  | $ | 1,195,747 |  |  |  |  |
Unearned revenue (Payments on account ) | (1,495,847) |  | (1,515,422) |  | (1,546,887) |  |  |  |  |
| March 31, 2024 (As Restated) | June 30, 2024 (As Restated) | September 30, 2024 (As Restated) |  |
| (in thousands)
Unbilled revenue (Unbilled services) | $ | 949,567 |  | $ | 1,021,519 |  | $ | 1,118,860 |  |  |  |  |
Unearned revenue (Payments on account ) | (1,585,694) |  | (1,544,275) |  | (1,477,952) |  |  |  |  |
| March 31, 2023 (As Restated) | June 30, 2023 (As Restated) | September 30, 2023 (As Restated) |  |
| (in thousands)
Unbilled revenue (Unbilled services) | $ | 880,412 |  | $ | 902,321 |  | $ | 828,453 |  |  |  |  |
Unearned revenue (Payments on account ) | (1,480,275) |  | (1,493,403) |  | (1,563,948) |  |  |  |  |

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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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