Goodwill and Acquisition-Related Intangible Assets

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Acquisition-Related Intangible Assets

Goodwill

The changes in the carrying values of goodwill for the years ended December 31, 2021 and 2020 are as follows (in thousands):


	Amount
Balance at December 31, 2019	$	54,855
Additions related to acquisitions (See Note 2 for additional information)	134,841
Balance at December 31, 2020	189,696
Escrow receipts from past acquisitions	(1,299)
Balance at December 31, 2021	$	188,397

The Company performed an annual test for goodwill impairment in the fourth quarter of the fiscal years ended December 31, 2021 and 2020 and determined that goodwill was not impaired.

Acquisition-Related Intangible Assets

The following table presents details of our acquisition-related intangible assets as of December 31, 2021 and 2020 (in thousands, except for years):


	December 31, 2021
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life (In Years)
Developed technology	$	124,730	$	(53,663)	$	71,067	4.5
Customer relationships	25,920		(7,899)		18,021		5.2
Trade name	8,990		(4,693)		4,297		3.8
Others	5,720		(5,550)		170		0.1
Total	$	165,360	$	(71,805)	$	93,555	4.6


	December 31, 2020
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life (In Years)
Developed technology	$	124,730	$	(31,805)	$	92,925	5.2
Customer relationships	25,920		(4,298)		21,622		6.2
Trade name	8,990		(2,946)		6,044		4.3
Others	5,720		(3,521)		2,199		1.1
Total	$	165,360	$	(42,570)	$	122,790	5.3

Amortization expense related to acquisition-related intangible assets was $29.2 million, $24.1 million and $13.4 million for the years ended December 31, 2021, 2020 and 2019, respectively.

As of December 31, 2021, future estimated amortization expense related to the acquired-related intangible assets is as follows (in thousands):


Years Ending December 31,	Future Amortization Expense
2022	$	26,774
2023	22,781
2024	16,103
2025	9,750
2026	7,737
Thereafter	10,410
Total	$	93,555