Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2020

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, 2018	$	335,887
Additions	—
Foreign currency exchange rate fluctuations	652
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

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(1)     Additions represent the preliminary value assigned to goodwill in connection with the 340B Link Business acquisition in October 2020.

Intangible Assets, Net

The carrying amounts and useful lives of intangible assets as of December 31, 2020 and 2019 were as follows:

	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		3 - 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

	December 31, 2019
	Gross carrying amount (1)		Accumulated amortization		Foreign currency exchange rate fluctuations		Net carrying amount		Useful life (years)
	(In thousands, except for years)
Customer relationships	$	135,234	$	(54,860)	$	(1,058)	$	79,316	10 - 30
Acquired technology	77,142		(36,194)		5		40,953		3 - 20
Backlog	1,150		(791)		—		359		4
Trade names	7,650		(5,037)		11		2,624		6 - 12
Patents	3,217		(1,603)		1		1,615		2 - 20
Total intangibles assets, net	$	224,393	$	(98,485)	$	(1,041)	$	124,867

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(1)     The differences in gross carrying amounts between periods are primarily due to additions of intangible assets in connection with the 340B Link Business acquisition, partially offset by the write-off of certain fully amortized intangible assets.

Amortization expense of intangible assets was $19.7 million, $18.9 million, and $23.8 million for the years ended December 31, 2020, 2019, and 2018, respectively.

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

	December 31, 2020
	(In thousands)
2021	$	23,948
2022	21,134
2023	19,113
2024	12,825
2025	11,616
Thereafter	79,575
Total	$	168,211