GOODWILL AND INTANGIBLE ASSETS:

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

The following table represents changes in the carrying amount of goodwill:



	(in thousands)
Carrying amount of goodwill at December 31, 2016	$	471,228
Acquisitions	—
Adjustments	—
Balance as of March 31, 2017	$	471,228

The carrying amounts of intangible assets as of March 31, 2017 were as follows:



	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
	(in thousands)
Licensed technology	$	28,916	$	(8,732	)	$	20,184
Developed technology	250,043		(86,178		)	163,865
Customer relationships	69,776		(19,494		)	50,282
Trade names	5,600		(2,056		)	3,544
Total finite-lived amortizable intangible assets	354,335		(116,460		)	237,875
In-process research and development	29,500		—			29,500
Total intangible assets	$	383,835	$	(116,460	)	$	267,375

The carrying amounts of intangible assets as of December 31, 2016 were as follows:



	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
	(in thousands)
Licensed technology	$	24,583	$	(6,559	)	$	18,024
Developed technology	250,043		(75,591		)	174,452
Customer relationships	69,776		(17,731		)	52,045
Backlog	11,300		(11,300		)	—
Trade names	5,600		(1,590		)	4,010
Total finite-lived amortizable intangible assets	361,302		(112,771		)	248,531
In-process research and development	29,500		—			29,500
Total intangible assets	$	390,802	$	(112,771	)	$	278,031

Amortization expense of intangible assets totaled approximately $15.0 million and $11.7 million for the three months ended March 31, 2017 and 2016, respectively.

The estimated future amortization expense from amortizable intangible assets is as follows:



	(in thousands)
2017 (remaining nine months)	$	45,466
2018	54,826
2019	47,194
2020	36,145
2021	30,618
Thereafter	23,626
Total	$	237,875

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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