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INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2022

NOTE 9—INTANGIBLE ASSETS

The carrying amount of intangible assets, net of accumulated amortization and impairment charges, as of December 31, 2022 and 2021 consisted of the following:


			2022
			Gross
			Carrying				Accumulated		Currency		Net Book
	Estimated Useful Lives		Amount		Acquisitions		Amortization		impact		Value
Amortizable intangibles:
Customer relationships	2 to 15	years	$	75,283	$	2,900	$	(70,273)	$	(115)	$	7,795
Noncompete agreements	4 to 7	years		5,962		300		(5,987)		—		275
Software	3 to 4	years		1,660		—		(1,557)		—		103
Backlog	1 to 2	years		5,002		—		(4,981)		(21)		—
Databases	4 to 15	years		13,218		—		(7,905)		(183)		5,130
Trademark and trade names	3 to 5	years		1,490		1,100		(1,513)		—		1,077
Intangibles			$	102,615	$	4,300	$	(92,216)	$	(319)	$	14,380


			2021
			Gross
			Carrying				Accumulated		Currency		Net Book
	Estimated Useful Lives		Amount		Acquisitions		Amortization		impact		Value
Amortizable intangibles:
Customer relationships	2 to 15	years	$	75,283	$	—	$	(68,677)	$	(111)	$	6,495
Noncompete agreements	4 to 7	years		5,962		—		(5,960)		—		2
Software	3 to 4	years		1,660		—		(1,534)		—		126
Backlog	1 to 2	years		5,002		—		(4,981)		(21)		—
Databases	4 to 15	years		13,218		—		(7,371)		(180)		5,667
Trademark and trade names	3 to 5	years		1,490		—		(1,370)		—		120
Intangibles			$	102,615	$	—	$	(89,893)	$	(312)	$	12,410

Amortization expense was $2.3 million and $2.6 million for the years ended December 31, 2022 and 2021, respectively. The estimated future amortization expense subsequent to December 31, 2022 is as follows:


2023	$	3,126
2024		2,550
2025		2,052
2026		1,533
2027		1,344
Thereafter		3,775
	$	14,380