Goodwill and Intangible Assets (Tables)

9 Months Ended

Oct. 26, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill were as follows:



(in thousands)	Signal Integrity		Signal, Integrity and Timing			Wireless and Sensing			Wireless, Sensing and Timing		Total
Balance as of January 26, 2014	$	—	$	261,891		$	15,007		$	—	$	276,898
Transfers	261,891		(261,891		)	(15,007		)	15,007		—
Balance at October 26, 2014	$	261,891	$	—		$	—		$	15,007	$	276,898

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 26, 2014							January 26, 2014
(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	$	146,925	$	(51,045	)	$	95,880	$	146,925	$	(35,357	)	$	111,568
Customer relationships	7-10 years	28,630		(10,616		)	18,014		28,630		(7,505		)	21,125
Technology licenses (1)	5-10 years	4,842		(1,563		)	3,279		3,842		(367		)	3,475
Other intangibles assets	1-5 years	6,600		(6,355		)	245		6,600		(5,824		)	776
Total finite-lived intangible assets		$	186,997	$	(69,579	)	$	117,418	$	185,997	$	(49,053	)	$	136,944


(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 income.

Future Amortization Expense for Intangible Assets

The estimated annual amount of future amortization expense for all finite-lived intangible assets will be as follows:



(in thousands)
To be recognized in:	Core Technologies		Customer Relationships		Technology Licenses		Other Intangibles		Total
Remaining three months of fiscal year 2015	$	5,231	$	1,038	$	455	$	157	$	6,881
Fiscal year 2016	20,919		4,149		1,798		88		26,954
Fiscal year 2017	20,919		4,149		1,026		—		26,094
Fiscal year 2018	20,919		4,130		—		—		25,049
Fiscal year 2019	17,507		4,000		—		—		21,507
Thereafter	10,385		548		—		—		10,933
Total expected amortization expense	$	95,880	$	18,014	$	3,279	$	245	$	117,418