Goodwill and Intangible Assets (Tables)

9 Months Ended

Oct. 25, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill were as follows:



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

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:



		October 25, 2015							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	2-10 years	$	148,156	$	(68,648	)	$	79,508	$	134,155	$	(53,286	)	$	80,869
Customer relationships	7-10 years	30,030		(14,747		)	15,283		28,030		(11,480		)	16,550
Technology licenses (1)	5-10 years	263		(209		)	54		263		(169		)	94
Other intangibles assets	1-5 years	6,600		(6,600		)	—		6,600		(6,513		)	87
Total finite-lived intangible assets		$	185,049	$	(90,204	)	$	94,845	$	169,048	$	(71,448	)	$	97,600


(1)	Technology licenses relate to end-license agreements for intellectual property that is used by the Company in research and development activities and also has alternative future uses. Amortization expense related to technology licenses is reported as “Product development and engineering” in the condensed consolidated statements of operations.

Future Amortization Expense for Intangible Assets

The estimated annual amount of future amortization expense for all finite-lived intangible assets is summarized below:



(in thousands)
To be recognized in:	Core Technologies		Customer Relationships		Technology Licenses		Total
Remaining three months of fiscal year 2016	$	5,304	$	1,100	$	12	$	6,416
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
Thereafter	4,007		33		—		4,040
Total expected amortization expense	$	79,508	$	15,283	$	54	$	94,845