Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill consists of the following (in thousands):


	Years Ended December 31,
	2021		2020
Beginning balance	$	285,214	$	214,513
Additions due to acquisitions	5,782		70,167
Foreign currency translation adjustment	(707)		822
Measurement period adjustments related to prior acquisitions	(526)		(288)
Ending balance	$	289,763	$	285,214

Intangible assets as of December 31, 2021 and December 31, 2020 consist of the following (in thousands, except weighted-average amortization period):


	December 31, 2021
	Weighted-Average Amortization Period (in months)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Developed technologies	76	$	57,521	$	(31,790)	$	25,731
Content library	60	12,230		(6,836)		5,394
Customer lists	47	16,190		(12,432)		3,758
Trade and domain names	44	11,613		(9,530)		2,083

Indefinite-lived trade name	—	3,600		—		3,600

Total intangible assets	65	$	101,154	$	(60,588)	$	40,566


	December 31, 2020
	Weighted-Average Amortization Period (in months)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Developed technologies	75	$	54,540	$	(24,246)	$	30,294
Content library	60	12,230		(4,390)		7,840
Customer lists	47	16,190		(10,437)		5,753
Trade and domain names	44	11,613		(7,888)		3,725
Non-compete agreements	31	2,018		(1,981)		37

Indefinite-lived trade name	—	3,600		—		3,600

Total intangible assets	64	$	100,191	$	(48,942)	$	51,249

During the years ended December 31, 2021, 2020 and 2019, amortization expense related to our intangible assets totaled approximately $13.7 million, $14.3 million and $7.5 million, respectively.

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



2022	$	11,303
2023	9,173
2024	6,121
2025	4,307
2026	3,959
Thereafter	2,103
Total	$	36,966