GOODWILL AND INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

The following table summarizes changes in goodwill during the six months ended June 30, 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	199,195
Measurement adjustments	(294)
Adjustments due to currency translation	392
Balance at June 30, 2023	$	1,045,997

The carrying amount of goodwill in foreign countries was $100.6 million as of June 30, 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 June 30, 2023, and December 31, 2022 (in thousands):


	June 30, 2023						December 31, 2022
	Gross		Accumulated Amortization		Carrying Value		Gross		Accumulated Amortization		Carrying Value		Useful Life in Years
Amortizable intangible assets:
Customer contracts	$	618,743	$	(211,538)	$	407,205	$	502,689	$	(204,130)	$	298,559	3-20
Trademarks and tradenames	18,165		(7,934)		10,231		17,351		(10,009)		7,342		7-20
Non-compete agreements	13,849		(8,646)		5,203		14,180		(8,226)		5,954		3-20
Patents	6,896		(6,881)		15		6,934		(6,802)		132		3-15
Other assets	1,983		(1,860)		123		2,016		(1,786)		230		10
Total amortizable intangible assets	$	659,636	$	(236,859)	422,777		$	543,170	$	(230,953)	312,217
Indefinite-lived intangible assets:
Trademarks and tradenames					138,670						104,304
Internet domains					2,227						2,227
Total indefinite-lived intangible assets					140,897						106,531
Total customer contracts and other intangible assets					$	563,674					$	418,748

The carrying amount of customer contracts in foreign countries was $46.5 million and $46.1 million as of June 30, 2023, and December 31, 2022, respectively. The carrying amount of trademarks and tradenames in foreign countries was $4.0 million and $4.2 million as of June 30, 2023 and December 31, 2022. The carrying amount of other intangible assets in foreign countries was $0.5 million and $0.7 million as of June 30, 2023, and December 31, 2022, respectively.

Amortization expense related to intangible assets was $18.0 million and $13.9 million for the three months ended June 30, 2023, and 2022, respectively. Amortization expense related to intangible assets was $32.0 million and $27.4 million for the six months ended June 30, 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 June 30, 2023, are as follows:


(in thousands)
2023 (excluding the six months ended June 30, 2023)	$	45,467
2024	75,662
2025	66,856
2026	63,339
2027	59,674