Goodwill and Intangible Assets (Tables)

12 Months Ended

Jan. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill by applicable reporting unit were as follows:



(in thousands)	Signal Integrity		Power and High-Reliability		Wireless and Sensing		Total
Balance as of January 25, 2015	$	261,891	$	—	$	18,428	$	280,319
Additions	—		49,384		—		49,384
Balance at January 31, 2016	$	261,891	$	49,384	$	18,428	$	329,703

Schedule of discounted cash flow inputs

Specifically, the income approach valuations included the following assumptions:



	November 30, 2015	November 30, 2014
Discount rate	11.0% - 24.0%	12.0% - 15.0%
Perpetual growth rate	3.0%	3.0%
Tax rate	13.5% - 40.0%	10.1% - 28.1%
Risk-free rate	2.6%	2.6%
Peer company beta	1.2 - 1.9	1.0 - 1.8

Schedule of finite-lived intangible assets

The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions and technology licenses purchased, which continue to be amortized:



		January 31, 2016							January 25, 2015
(in thousands)	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core technologies	5-8 years	$	148,210	$	(74,006	)	$	74,204	$	134,155	$	(53,286	)	$	80,869
Customer relationships	5-10 years	30,030		(15,847		)	14,183		28,030		(11,480		)	16,550
Technology licenses ⁽¹⁾	2 years	100		(58		)	42		263		(169		)	94
Other intangibles assets	1-5 years	6,600		(6,600		)	—		6,600		(6,513		)	87
Total finite-lived intangible assets		$	184,940	$	(96,511	)	$	88,429	$	169,048	$	(71,448	)	$	97,600


(1)	Technology licenses relate to licensing agreements entered into by the Company that are used in research and development activities and have alternative future uses. Amortization expense related to technology licenses is reported as “Product development and engineering” in the consolidated statements of operations.

Schedule of finite-lived intangible assets impairment loss

Impairment charges for these items, which resulted in a new basis for the affected intangible assets, are included in the consolidated statements of operations as follows:



(in thousands)	January 31, 2016		January 25, 2015		January 26, 2014
Product development and engineering	$	—	$	3,119	$	2,354
Intangible asset impairments	—		11,636		29,938
Impairment of finite-lived intangible assets	$	—	$	14,755	$	32,292

Additions to finite-lived intangible assets

The following table sets forth the Company’s changes to finite-lived intangible assets resulting from purchases, additions from acquisitions, and transfers from IPR&D:



(in thousands)	Gross Carrying Amount
Gross carrying value at January 26, 2014	$	185,997
Purchased intangible assets	1,100
Acquired intangible assets	1,430
Decrease in gross carrying value due to impairment of finite-lived intangible assets	(19,479		)
Gross carrying value at January 25, 2015	169,048
Purchased intangible assets	12,000
Transfers from in-process research and development	4,000
Other	(108		)
Gross carrying value at January 31, 2016	$	184,940

Schedule of future amortization expense

The estimated annual amount of future amortization expense for finite-lived intangible assets is expected to be as follows:



(in thousands)
To be recognized in:	Core Technologies		Customer relationships		Technology licenses		Total
Fiscal year 2017	$	21,213	$	4,400	$	42	$	25,655
Fiscal year 2018	21,213		4,400		—		$	25,613
Fiscal year 2019	17,801		4,400		—		$	22,201
Fiscal year 2020	9,970		950		—		$	10,920
Fiscal year 2021	2,856		33		—		$	2,889
Thereafter	1,151		—		—		$	1,151
Total expected amortization expense	$	74,204	$	14,183	$	42	$	88,429

Schedule of indefinite-lived intangible assets

The following table sets forth the Company’s indefinite-lived intangible assets from additions to IPR&D, acquisitions, impairments, and transfers to core technologies:



(in thousands)	Gross Carrying Amount
Net carrying value at January 26, 2014	$	4,000
In-process research and development through acquisitions	—
In-process research and development impairment	—
Transfers to core technologies	—
Net carrying value at January 25, 2015	4,000
In-process research and development through acquisitions	—
In-process research and development impairment	—
Transfers to core technologies	(4,000		)
Net carrying value at January 31, 2016	$	—