Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill information by reportable units

The following tables present goodwill information for each of the reportable segments for the years ended December 31, 2017 and December 31, 2016:

Reportable Segment:	December 31, 2016		Addition to Goodwill (1)		Impairment Charge of Goodwill		Effect of Exchange Rates (2)		December 31, 2017
	(In thousands)
MID	$	66,643	$	—	$	—	$	—	$	66,643
RSD	138,151		803		—		4,064		143,018
Total	$	204,794	$	803	$	—	$	4,064	$	209,661

(1) During the first quarter of 2017, the Company corrected an immaterial error related to an overstatement in prepaids and other current assets that originated in 2016.

(2) Effect of exchange rates relates to foreign currency translation adjustments for the period.

	As of December 31, 2017
Reportable Segment:	Gross Carrying Amount		Accumulated Impairment Losses			Net Carrying Amount
	(In thousands)
MID	$	66,643	$	—		$	66,643
RSD	143,018		—			143,018
Other	21,770		(21,770		)	—
Total	$	231,431	$	(21,770	)	$	209,661

Reportable Segment:	December 31, 2015		Addition to Goodwill (1)		Impairment Charge of Goodwill		Effect of Exchange Rates (2)			December 31, 2016
MID	$	19,905	$	46,738	$	—	$	—		$	66,643
RSD	96,994		46,903		—		(5,746		)	138,151
Total	$	116,899	$	93,641	$	—	$	(5,746	)	$	204,794

(1) The additions to goodwill are a result of the acquisitions of Smart Card Software Limited (“SCS”) during the first quarter of 2016, and Inphi's Memory Interconnect Business and the assets of the Snowbush IP group during the third quarter of 2016. See Note 18, “Acquisitions” for further details.

(2) Effect of exchange rates relates to foreign currency translation adjustments for the period.

	As of December 31, 2016
Reportable Segment:	Gross Carrying Amount		Accumulated Impairment Losses			Net Carrying Amount
MID	$	66,643	$	—		$	66,643
RSD	138,151		—			138,151
Other	21,770		(21,770		)	—
Total	$	226,564	$	(21,770	)	$	204,794

Components of intangible assets

The components of the Company’s intangible assets as of December 31, 2017 and December 31, 2016 were as follows:

		As of December 31, 2017
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
		(In thousands)
Existing technology	3 to 10 years	$	258,008	$	(191,554	)	$	66,454
Customer contracts and contractual relationships	1 to 10 years	68,794		(48,626		)	20,168
Non-compete agreements and trademarks	3 years	300		(300		)	—
In-process research and development	Not applicable	5,100		—			$	5,100
Total intangible assets		$	332,202	$	(240,480	)	$	91,722

		As of December 31, 2016
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
		(In thousands)
Existing technology (1)	3 to 10 years	$	256,656	$	(156,577	)	$	100,079
Customer contracts and contractual relationships (1)	1 to 10 years	65,109		(37,900		)	27,209
Non-compete agreements and trademarks	3 years	300		(300		)	—
In-process research and development (2)	Not applicable	5,100		—			$	5,100
Total intangible assets		$	327,165	$	(194,777	)	$	132,388

(1) Includes intangible assets from the acquisitions of SCS, Inphi's Memory Interconnect Business, and the assets of the Snowbush IP group. See Note 18, “Acquisitions” for further details.

(2) Includes intangible assets from the acquisitions of Inphi's Memory Interconnect Business and the assets of the Snowbush IP group. See Note 18, “Acquisitions” for further details. The in-process research and development assets are accounted for as indefinite-lived intangible assets until the underlying projects are completed or abandoned.

Estimated future amortization expense of intangible assets

The estimated future amortization expense of intangible assets as of December 31, 2017 was as follows (amounts in thousands):

Years Ending December 31:	Amount
2018	$	30,382
2019	19,942
2020	19,220
2021	12,683
2022	1,331
Thereafter	3,064
Total amortizable purchased intangible assets	86,622
In-process research and development	5,100
Total intangible assets	$	91,722