| Disaggregation of revenue |
The following table summarizes revenue: | | | | | | | | | | | | | | | | | | | Year Ended December 31, | | (in thousands, except percentages) | 2024 | | 2023 | | 2022 | | Revenue: | | | | | | | Subscription lease licenses | $ | 948,831 | | | $ | 786,050 | | | $ | 687,665 | | | Perpetual licenses | 315,085 | | | 302,698 | | | 301,313 | | | Software licenses | 1,263,916 | | | 1,088,748 | | | 988,978 | | | Maintenance | 1,209,217 | | | 1,103,523 | | | 1,004,245 | | | Service | 71,676 | | | 77,678 | | | 72,330 | | | Maintenance and service | 1,280,893 | | | 1,181,201 | | | 1,076,575 | | | Total revenue | $ | 2,544,809 | | | $ | 2,269,949 | | | $ | 2,065,553 | | | | | | | | | Direct revenue, as a percentage of total revenue | 75.2 | % | | 73.9 | % | | 76.1 | % | | Indirect revenue, as a percentage of total revenue | 24.8 | % | | 26.1 | % | | 23.9 | % |
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| Changes in deferred revenue |
The changes in deferred revenue, inclusive of both current and long-term deferred revenue, during the years ended December 31, 2024 and 2023 were as follows: | | | | | | | | | | | | | (in thousands) | 2024 | | 2023 | | Beginning balance – January 1 | $ | 479,754 | | | $ | 435,758 | | | Acquired deferred revenue | — | | | 8,030 | | | Deferral of revenue | 2,617,131 | | | 2,305,294 | | | Recognition of deferred revenue | (2,544,809) | | | (2,269,949) | | | Currency translation | (15,771) | | | 621 | | | Ending balance – December 31 | $ | 536,305 | | | $ | 479,754 | |
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| Remaining performance obligations, expected timing of satisfaction |
Total revenue allocated to remaining performance obligations as of December 31, 2024 will be recognized as revenue as follows: | | | | | | | (in thousands) | | | Next 12 months | $ | 1,029,144 | | | Months 13-24 | 419,744 | | | Months 25-36 | 206,327 | | | Thereafter | 63,052 | | | Total revenue allocated to remaining performance obligations | $ | 1,718,267 | |
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