| Schedule of Changes in Carrying Amount of Goodwill |
The changes in the carrying amount of goodwill for the years ended December 31, 2023 and 2022 were as follows: | | | | | | | Goodwill | | (in thousands) | | Balance as of December 31, 2021 | $ | 1,588,452 | | | Goodwill acquired | 69,291 | | | Foreign currency translation | (11,623) | | | Balance as of December 31, 2022 | $ | 1,646,120 | | | Goodwill acquired | 42,780 | | | Foreign currency translation | 2,927 | | | Balance as of December 31, 2023 | $ | 1,691,827 | |
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| Summary of Estimated Useful Lives of Intangible Assets |
The estimated useful lives of intangible assets are generally as follows: | | | | | | | | | | Intangible Asset | | Estimated Useful
Life | | Domain names | | 5 Years | | Trademarks | | 3 Years | | Acquired developed technology | | 3 to 7 Years | | Customer relationships | | 2 to 8 Years | | Patents | | 4 to 14 Years |
Intangible assets consisted of the following: | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2023 | | Weighted-
Average
Remaining
Useful Life -
Years | | Gross
Carrying
Amount | | Accumulated
Amortization | | Net | | | | | | | | | | (in thousands, except years) | | Domain names | 3.0 | | $ | 745 | | | $ | (546) | | | $ | 199 | | | Technology | 2.8 | | 323,313 | | | (197,608) | | | 125,705 | | | Patents | 8.8 | | 39,373 | | | (19,099) | | | 20,274 | | | Other | — | | 6,000 | | | (5,875) | | | 125 | | | | | $ | 369,431 | | | $ | (223,128) | | | $ | 146,303 | |
| | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2022 | | Weighted-
Average
Remaining
Useful Life -
Years | | Gross
Carrying
Amount | | Accumulated
Amortization | | Net | | | | | | | | | | (in thousands, except years) | | Domain names | 4.0 | | $ | 954 | | | $ | (690) | | | $ | 264 | | | Trademarks | 1.2 | | 800 | | | (478) | | | 322 | | | Technology | 3.1 | | 340,375 | | | (178,427) | | | 161,948 | | | Customer relationships | 5.7 | | 21,000 | | | (6,641) | | | 14,359 | | | Patents | 9.1 | | 39,373 | | | (14,912) | | | 24,461 | | | Other | 1.0 | | 6,000 | | | (2,874) | | | 3,126 | | | | | $ | 408,502 | | | $ | (204,022) | | | $ | 204,480 | |
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| Schedule of Estimated Intangible Asset Amortization Expense |
As of December 31, 2023, the estimated intangible asset amortization expense for the next five years and thereafter is as follows: | | | | | | | Estimated
Amortization | | (in thousands) | | Year ending December 31, | | | 2024 | $ | 58,532 | | | 2025 | 42,513 | | | 2026 | 20,776 | | | 2027 | 12,104 | | | 2028 | 4,323 | | | Thereafter | 8,055 | | | Total | $ | 146,303 | |
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