Intangible Assets

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

The Company’s intangible assets at March 31, 2017 and December 31, 2016 consisted of the following:



	March 31, 2017							December 31, 2016
(in thousands)	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Impairment			Net
Other intangible assets:
Developed technology	$	757,000	$	(65,439	)	$	691,561	$	757,000	$	(55,623	)	$	—		$	701,377
In-process research and development	39,000		(1,264		)	37,736		39,000		(722		)	—			38,278
Trade name	26,000		—			26,000		35,500		—			(9,500		)	26,000
Service provider network	2,000		—			2,000		2,000		—			—			2,000
Customer relationships	8,000		(556		)	7,444		8,000		(472		)	—			7,528
Software	885		(154		)	731		660		(104		)	—			556
Software not yet placed in service	1,309		—			1,309		753		—			—			753
Other	100		(13		)	87		100		(8		)	—			92
Total intangible assets	$	834,294	$	(67,426	)	$	766,868	$	843,013	$	(56,929	)	$	(9,500	)	$	776,584

At March 31, 2017, the weighted-average amortization period remaining for the finite-lived intangible assets was 18.0 years. At March 31, 2017, the weighted-average amortization periods remaining for developed technology, customer relationships, in-process R&D, software and other was 18.0, 22.3, 17.5, 4.0, and 5.3 years, respectively.

Estimated annual amortization expense for finite-lived intangible assets, excluding amounts not placed in service, subsequent to March 31, 2017 is as follows:



(in thousands)	Amount
2017 (remaining)	$	31,488
2018	41,984
2019	41,979
2020	41,901
2021	41,814
Thereafter	538,393
Total	$	737,559