Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Goodwill

The following table represents changes in the carrying amount of goodwill:

	(In thousands)
Balance as of December 31, 2019	$	336,539
Additions (1)	161,117
Foreign currency exchange rate fluctuations	1,653
Balance as of December 31, 2020	499,309
Additions (1)	242,964
Measurement period adjustments (1)	(2,321)
Foreign currency exchange rate fluctuations	(1,052)
Balance as of December 31, 2021	$	738,900

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(1)     Refer to Note 2, Business Combinations, for further information.

Intangible Assets, Net

The carrying amounts and useful lives of intangible assets as of December 31, 2021 and 2020 were as follows:

	December 31, 2021
	Gross carrying amount (1)		Accumulated amortization		Foreign currency exchange rate fluctuations		Net carrying amount		Useful life (years)
	(In thousands, except for years)
Customer relationships	$	309,989	$	(78,093)	$	(933)	$	230,963	10 - 30
Acquired technology	95,466		(55,859)		6		39,613		4 - 20
Backlog	1,800		—		—		1,800		2
Trade names	9,200		(5,600)		14		3,614		5 - 12
Patents	2,462		(1,186)		—		1,276		2 - 20
Non-compete agreements	600		(250)		—		350		3
Total intangibles assets, net	$	419,517	$	(140,988)	$	(913)	$	277,616

	December 31, 2020
	Gross carrying amount (1)		Accumulated amortization		Foreign currency exchange rate fluctuations		Net carrying amount		Useful life (years)
	(In thousands, except for years)
Customer relationships	$	187,889	$	(64,254)	$	(777)	$	122,858	10 - 30
Acquired technology	86,029		(44,851)		6		41,184		5 - 20
Backlog	1,150		(1,078)		—		72		4
Trade names	7,850		(5,794)		14		2,070		1 - 12
Patents	2,930		(1,455)		2		1,477		2 - 20
Non-compete agreements	600		(50)		—		550		3
Total intangibles assets, net	$	286,448	$	(117,482)	$	(755)	$	168,211

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(1)     The differences in gross carrying amounts between periods are primarily due to additions of intangible assets in connection with acquisitions, partially offset by the write-off of certain fully amortized intangible assets.

Amortization expense of intangible assets was $26.5 million, $19.7 million, and $18.9 million for the years ended December 31, 2021, 2020, and 2019, respectively.

The estimated future amortization expenses for amortizable intangible assets were as follows:

	December 31, 2021
	(In thousands)
2022	$	35,400
2023	31,486
2024	22,985
2025	20,859
2026	17,885
Thereafter	149,001
Total	$	277,616