The changes in the carrying amount of goodwill for the years ended December 31, 2025 and 2024 were as follows:


	Goodwill
	(in thousands)
Balance as of December 31, 2023	$	1,691,827

Foreign currency translation	(2,042)
Balance as of December 31, 2024	$	1,689,785
Goodwill acquired	24,549
Foreign currency translation	6,435
Balance as of December 31, 2025	$	1,720,769


	As of December 31, 2025
	Weighted- Average Remaining Useful Life (Years)	Gross Carrying Amount		Accumulated Amortization		Net

	(in thousands, except years)

Technology	2.6	$	328,234	$	(274,464)	$	53,770
Patents	8.9	30,172		(17,485)		12,687
Other	3.3	835		(679)		156
Total intangible assets		$	359,241	$	(292,628)	$	66,613


	As of December 31, 2024
	Weighted- Average Remaining Useful Life (Years)	Gross Carrying Amount		Accumulated Amortization		Net

	(in thousands, except years)


Technology	2.3	$	308,333	$	(238,189)	$	70,144

Patents	8.8	39,373		(23,286)		16,087
Other	2.0	6,745		(6,613)		132
Total intangible assets		$	354,451	$	(268,088)	$	86,363

Amortization of intangible assets for the years ended December 31, 2025, 2024, and 2023 was $45.5 million, $60.0 million, and $81.1 million, respectively. We revised the useful lives of certain customer relationships, trademarks, domain names, and technology for the years ended December 31, 2024 and 2023, which resulted in a $3.2 million and $19.9 million increase to amortization expense for the respective years.

As of December 31, 2025, the estimated intangible asset amortization expense for the next five years and thereafter is as follows:


	Estimated Amortization
	(in thousands)
Year ending December 31,
2026	$	26,775
2027	18,599
2028	8,092
2029	4,789
2030	2,937
Thereafter	5,421
Total	$	66,613