INTANGIBLE ASSETS AND GOODWILL

9 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Finite-lived Intangibles

The Company has finite-lived intangible assets which are amortized over their estimated useful lives on a straight-line basis. The following table presents the gross carrying amount and accumulated amortization of finite-lived intangible assets (dollars in thousands):


		September 30, 2020						December 31, 2019
	Weighted Average Useful Life (in years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Developed technology	2.9	$	141,337	$	(22,144)	$	119,193	$	39,984	$	(34,268)	$	5,716
Content library	3.6	4,700		(1,619)		3,081		4,700		(976)		3,724
Customer relationships	10.5	296,046		(12,125)		283,921		—		—		—
Customer contracts	1.5	58,580		(12,921)		45,659		—		—		—
Trade names, trademarks, and domain names	2.5	7,212		(1,060)		6,152		—		—		—
Total		$	507,875	$	(49,869)	$	458,006	$	44,684	$	(35,244)	$	9,440

During the first quarter of 2020, the gross carrying amount and accumulated amortization of fully amortized intangible assets were written off. Amortization of customer-related intangible assets is recorded in sales and marketing expense in the accompanying condensed consolidated statements of operations; amortization of developed technology and content library intangible assets is recorded in cost of revenue; amortization of all other finite-lived intangibles is recorded in general and administrative expense. Total amortization expense was $24.3 million and $1.0 million for the three months ended September 30, 2020 and 2019, respectively. Total amortization expense was $44.5 million and $3.3 million for the nine months ended September 30, 2020 and 2019 respectively.

The following table presents the Company's estimate of remaining amortization expense for finite-lived intangible assets that existed as of September 30, 2020 (in thousands):


2020 - remaining period	$	24,176
2021	95,421
2022	72,331
2023	50,295
2024	42,238
Thereafter	173,545
Estimated remaining amortization expense	$	458,006

The Company evaluates the recoverability of its long-lived assets with finite useful lives, including intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amounts may not be recoverable. The Company does not believe an impairment trigger occurred which would impact the recoverability of the carrying values as of September 30, 2020. There were no impairment charges related to identifiable intangible assets for the three and nine months ended September 30, 2020 and 2019.

Goodwill

The following table presents the carrying amount of goodwill (in thousands):


Balance as of December 31, 2019	$	47,453
Goodwill resulting from acquisitions	914,373
Measurement period adjustments	(2,694)
Effect of foreign currency translation	1,288
Balance as of September 30, 2020	$	960,420