GOODWILL AND INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

The following table summarizes changes in goodwill during the three months ended March 31, 2023 and the twelve months ended December 31, 2022 (in thousands):


Goodwill:
Balance at December 31, 2021	$	786,504
Additions	64,997
Measurement adjustments	(9)
Adjustments due to currency translation	(4,788)
Balance at December 31, 2022	846,704
Additions	6,050
Measurement adjustments	—
Adjustments due to currency translation	46
Balance at March 31, 2023	$	852,800

The carrying amount of goodwill in foreign countries was $98.0 million as of March 31, 2023 and $97.4 million as of December 31, 2022.

The following table sets forth the components of indefinite-lived and amortizable intangible assets as of March 31, 2023 and December 31, 2022 (in thousands):


	March 31, 2023						December 31, 2022
	Gross		Accumulated Amortization		Carrying Value		Gross		Accumulated Amortization		Carrying Value		Useful Life in Years
Amortizable intangible assets:
Customer contracts	$	504,980	$	(208,486)	$	296,494	$	502,689	$	(204,130)	$	298,559	3-20
Trademarks and tradenames	17,516		(10,346)		7,170		17,351		(10,009)		7,342		7-20
Non-compete agreements	13,923		(8,943)		4,980		14,180		(8,226)		5,954		3-20
Patents	6,916		(6,896)		20		6,934		(6,802)		132		3-15
Other assets	1,980		(1,805)		175		2,016		(1,786)		230		10
Total amortizable intangible assets	$	545,315	$	(236,476)	308,839		$	543,170	$	(230,953)	312,217
Indefinite-lived intangible assets:
Trademarks and tradenames					104,183						104,304
Internet domains					2,227						2,227
Total indefinite-lived intangible assets					106,410						106,531
Total customer contracts and other intangible assets					$	415,249					$	418,748

The carrying amount of customer contracts in foreign countries was $45.3 million and $46.1 million as of March 31, 2023 and December 31, 2022, respectively. The carrying amount of trademarks and tradenames in foreign countries was $4.2 million as of March 31, 2023 and December 31, 2022. The carrying amount of other intangible assets in foreign countries was $0.6 million and $0.7 million as of March 31, 2023 and December 31, 2022, respectively.

Amortization expense related to intangible assets was $14.0 million and $13.4 million for the three months ended March 31, 2023 and 2022, respectively. Customer contracts and other amortizable intangible assets are amortized on a straight-line basis over their economic useful lives.

Estimated amortization expense for the existing carrying amount of customer contracts and other intangible assets for each of the five succeeding fiscal years as of March 31, 2023 are as follows:


(in thousands)
2023 (excluding the three months ended March 31, 2023)	$	45,487
2024	57,542
2025	48,732
2026	45,214
2027	41,550