Goodwill and Intangible Assets (Tables)

9 Months Ended

Oct. 29, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by applicable reporting unit is as follows:



(in thousands)	Signal Integrity		Power and High Reliability		Wireless and Sensing		Total
Balance at January 29, 2017	$	261,891	$	49,384	$	18,428	$	329,703
Additions ⁽¹⁾	12,187		—		—		12,187
Balance at October 29, 2017	$	274,078	$	49,384	$	18,428	$	341,890

(1) Composed of goodwill recognized on the acquisition date and subsequent adjustments resulting from changes to the acquisition date fair values of net assets acquired in the business combination recorded during their respective measurement periods.

Schedule of Finite-Lived Intangible Assets

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



		October 29, 2017							January 29, 2017
(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	$	164,930	$	(109,609	)	$	55,321	$	144,930	$	(92,940	)	$	51,990
Customer relationships	5-10 years	34,030		(23,991		)	10,039		30,030		(20,247		)	9,783
Total finite-lived intangible assets		$	198,960	$	(133,600	)	$	65,360	$	174,960	$	(113,187	)	$	61,773

Schedule of Finite-lived Intangible Assets Acquired

The following table sets forth the Company’s finite-lived intangible assets resulting from acquisitions:



(in thousands)	Gross Carrying Value
Value at January 29, 2017	$	174,960
Acquired intangible assets	24,000
Value at October 29, 2017	$	198,960

Schedule of Indefinite-Lived Intangible Assets

The following table sets forth the Company’s indefinite-lived intangible assets resulting from additions to IPR&D:



(in thousands)	Net Carrying Value
Value at January 29, 2017	$	—
In-process research and development through acquisitions	2,300
Value at October 29, 2017	$	2,300