| Schedule of changes in the carrying amount of goodwill |
The following table details the cost basis changes in the carrying amount of goodwill (in thousands): | | | | Balance as of December 31, 2021 | | $ | 3,009,769 | Decreases due to measurement period adjustments related to prior year acquisitions | | | (211) | Balance as of December 31, 2022 | | | 3,009,558 | Goodwill recorded in connection with acquisitions (Note 6) | | | 20,455 | Balance as of December 31, 2023 | | | 3,030,013 | Rollover options deferred tax asset adjustment | | | (10,014) | Total | | $ | 3,019,999 |
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| Schedule of amortization for definite-lived intangible assets |
Amortization for definite-lived intangible assets is as follows (in thousands, except useful life): | | | | | | | | | | | | | | | | | | | | | | | Weighted- | | | | | | | | | Net | | Average | | | Gross Carrying | | Accumulated | | Carrying | | Remaining | | | Amount | | Amortization | | Value | | Useful Life | As of December 31, 2024 | | | | | | | | | | | | Customer relationships | | $ | 1,429,400 | | $ | (440,729) | | $ | 988,671 | | 11.1 | Purchased developed technology | | | 81,800 | | | (50,875) | | | 30,925 | | 4.2 | Tradenames and trademarks | | | 40,700 | | | (21,247) | | | 19,453 | | 4.7 | Total | | $ | 1,551,900 | | $ | (512,851) | | $ | 1,039,049 | | | As of December 31, 2023 | | | | | | | | | | | | Customer relationships | | $ | 1,429,400 | | $ | (345,848) | | $ | 1,083,552 | | 12.3 | Purchased developed technology | | | 301,100 | | | (221,558) | | | 79,542 | | 3.0 | Tradenames and trademarks | | | 40,700 | | | (16,857) | | | 23,842 | | 6.0 | Total | | $ | 1,771,200 | | $ | (584,263) | | $ | 1,186,936 | | |
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| Schedule of estimated future amortization expense |
Estimated future amortization expense is as follows (in thousands): | | | | Year ending, December 31, | | | | 2025 | | $ | 110,093 | 2026 | | | 103,831 | 2027 | | | 103,831 | 2028 | | | 103,831 | 2029 | | | 101,915 | Thereafter | | | 515,548 | Total | | $ | 1,039,049 |
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