Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill balances are presented below (in thousands):



	Carrying Amount
Balance as of December 31, 2017	$	128,728
Goodwill acquired	26,063
Foreign currency translation adjustments	(5,946		)
Balance as of December 31, 2018	148,845
Goodwill acquired	2,246
Foreign currency translation adjustments	5,665
Balance as of December 31, 2019	$	156,756

Intangible assets consist of the following (in thousands):



	December 31,			December 31,
	2019			2018
Developed technology	$	177,746		$	114,395
Patents	67,730			57,180
Other	3,594			650
Total intangible assets	249,070			172,225
Less: accumulated amortization	(105,220		)	(71,643		)
Net carrying amount	$	143,850		$	100,582

The following table presents the estimated future amortization expense related to intangible assets held at December 31, 2019 (in thousands):



Years Ending December 31,
2020	$	35,641
2021	33,322
2022	28,343
2023	22,507
2024	15,809
Thereafter	8,228
Total future amortization expense	$	143,850