Goodwill and Intangible Assets (Tables)

12 Months Ended

Jan. 29, 2017

Goodwill and Intangible Assets Disclosure [Abstract]



(in thousands)	Signal Integrity		Power and High-Reliability		Wireless and Sensing		Total
Balance at January 31, 2016	$	261,891	$	49,384	$	18,428	$	329,703
Additions	—		—		—		—
Balance at January 29, 2017	$	261,891	$	49,384	$	18,428	$	329,703

Schedule of income approach valuation assumptions

Specifically, the income approach valuations included the following assumptions:



	November 30, 2015
Discount rate	11.0% - 24.0%
Perpetual growth rate	3.0%
Tax rate	13.5% - 40.0%
Risk-free rate	2.6%
Peer company beta	1.2 - 1.9

Schedule of finite-lived intangible assets which continue to be amortized

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 29, 2017							January 31, 2016
(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	$	144,930	$	(92,940	)	$	51,990	$	148,210	$	(74,005	)	$	74,205
Customer relationships	5-10 years	30,030		(20,247		)	9,783		30,030		(15,847		)	14,183
Technology licenses ⁽¹⁾	2 years	100		(100		)	—		100		(58		)	42
Total finite-lived intangible assets		$	175,060	$	(113,287	)	$	61,773	$	178,340	$	(89,910	)	$	88,430


(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 Income.

Schedule of impairment loss of finite-lived intangible assets

Impairment charges for these items, which resulted in a new basis for the affected intangible assets, are included in the Consolidated Statements of Income as follows:



(in thousands)	January 29, 2017		January 31, 2016		January 25, 2015
Product development and engineering	$	—	$	—	$	3,119
Intangible asset impairments	—		—		11,636
Impairment of finite-lived intangible assets	$	—	$	—	$	14,755

Changes to gross carrying value of 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 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
Snowbush divestiture	(3,280		)
Gross carrying value at January 29, 2017	$	181,660

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 2018	$	20,744	$	4,400	$	—	$	25,144
Fiscal year 2019	17,332		4,400		—		21,732
Fiscal year 2020	9,905		950		—		10,855
Fiscal year 2021	3,056		33		—		3,089
Fiscal year 2022	571		—		—		571
Thereafter	382		—		—		382
Total expected amortization expense	$	51,990	$	9,783	$	—	$	61,773

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 25, 2015	$	4,000
Transfers to core technologies	(4,000		)
Net carrying value at January 31, 2016	—
Net carrying value at January 29, 2017	$	—