Goodwill and Intangible Assets

Changes in the carrying amount of goodwill for the six months ended June 30, 2018 are as follows:



(in thousands)	Goodwill
Balance as of December 31, 2017	$	9,402
Measurement period adjustment	(3,654		)
Foreign currency translation	(68		)
Balance as of June 30, 2018	$	5,680

See note 3 for a description of the measurement period adjustment.

The Company’s intangible assets at June 30, 2018 and December 31, 2017 consisted of the following:



	June 30, 2018							December 31, 2017
(in thousands)	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Other intangible assets:
Developed technology	$	759,374	$	(114,916	)	$	644,458	$	759,374	$	(94,886	)	$	664,488
In-process research and development	39,000		(3,972		)	35,028		39,000		(2,889		)	36,111
Trade name	29,816		—			29,816		29,816		—			29,816
Service provider network	2,000		—			2,000		2,000		—			2,000
Customer relationships	20,306		(972		)	19,334		20,306		(806		)	19,500
Software	7,581		(1,344		)	6,237		1,274		(404		)	870
Software not yet placed in service	—		—			—		5,022					5,022
Other	100		(33		)	67		100		(25		)	75
Total intangible assets	$	858,177	$	(121,237	)	$	736,940	$	856,892	$	(99,010	)	$	757,882

At June 30, 2018, the weighted-average amortization period remaining for the finite-lived intangible assets was 16.9 years. At June 30, 2018, the weighted-average amortization periods remaining for developed technology, customer relationships, in-process R&D, software and other was 16.8, 21.2, 16.3, 2.6, and 4.0 years, respectively.

Estimated annual amortization expense for finite-lived intangible assets, excluding amounts in Work in Progress, subsequent to June 30, 2018 is as follows:



(in thousands)	Amount
2018 (remaining)	$	22,528
2019	46,128
2020	46,109
2021	44,893
2022	43,673
Thereafter	501,793
Total	$	705,124