The following table details acquired intangible assets (in thousands):


	Balance at June 30, 2026
	Weighted Average Estimated Useful Life	Cost		Accumulated Amortization		Net
Technology assets	5 years	$	359,008	$	(323,582)	$	35,426
Customer assets	15 years	1,418,425		(442,944)		975,481
Trade names and other	9 years	389,137		(199,782)		189,355

Total		$	2,166,570	$	(966,308)	$	1,200,262


	Balance at December 31, 2025
	Weighted Average Estimated Useful Life	Cost		Accumulated Amortization		Net
Technology assets	5 years	$	359,008	$	(297,960)	$	61,048
Customer assets	15 years	1,401,701		(391,100)		1,010,601
Trade names and other	9 years	389,137		(179,116)		210,021

Total		$	2,149,846	$	(868,176)	$	1,281,670

The change in the carrying value of intangible assets was as follows (in thousands):


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Acquired intangible assets, net, beginning of the period	$	1,245,784	$	1,391,242	$	1,281,670	$	1,433,067

Amortization expense	(47,082)		(48,295)		(94,058)		(96,625)
Foreign currency translation and other adjustments	1,560		25,788		12,650		32,293
Acquired intangible assets, net, end of the period	$	1,200,262	$	1,368,735	$	1,200,262	$	1,368,735

The estimated future amortization expense of intangible assets as of June 30, 2026 was as follows (in thousands):