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Intangible Assets

3 Months Ended

Mar. 31, 2023

Intangible assets as of March 31, 2023 and December 31, 2022 consist of the following:


		As of March 31, 2023				As of December 31, 2022
(In thousands)	Useful Life (in years)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Acquired technology	3 to 7	$	43,590	$	42,057	$	42,022	$	41,894
Customer relationships	5 to 12	34,551		24,051		34,386		23,323
Patents, trademarks, and other	10 to 20	13,538		12,248		13,518		12,227
Total		$	91,679	$	78,356	$	89,926	$	77,444

Amortization expense was $0.6 million and $1.4 million for the three months ended March 31, 2023 and 2022, respectively.

Certain intangible assets are denominated in functional currencies besides the U.S. dollar and are subject to currency fluctuations.

There was no impairment of intangible assets recorded during the three months ended March 31, 2023 and 2022.