Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Goodwill balances are presented below (in thousands):

	Carrying Amount
Balance as of December 31, 2018	$	148,845
Foreign currency translation adjustments	2,339
Balance as of March 31, 2019	$	151,184

Intangible assets consist of the following (in thousands):

	March 31,			December 31,
	2019			2018
Developed technology	$	113,759		$	114,395
Patents	57,180			57,180
Other	650			650
Total intangible assets	171,589			172,225
Less: accumulated amortization	(78,337		)	(71,643		)
Net carrying amount	$	93,252		$	100,582

Amortization expense for intangible assets for the three months ended March 31, 2019 and 2018 was approximately $7.0 million and $5.7 million, respectively.

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

Years Ending December 31,
Remainder of 2019	$	21,861
2020	19,371
2021	17,336
2022	13,673
2023	7,764
Thereafter	13,247
Total future amortization expense	$	93,252