Goodwill and Intangible Assets

6 Months Ended

Jul. 28, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

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



(in thousands)	Signal Integrity		Wireless and Sensing		Protection		Total
Balance at January 27, 2019	$	274,085	$	72,128	$	4,928	$	351,141
Additions	—		—		—		—
Balance at July 28, 2019	$	274,085	$	72,128	$	4,928	$	351,141



(in thousands)	Signal Integrity		Wireless and Sensing		Protection		Total
Balance at January 28, 2018	$	274,085	$	67,812	$	—	$	341,897
Additions	—		—		4,834		4,834
Balance at July 29, 2018	$	274,085	$	67,812	$	4,834	$	346,731

The reporting units are the same as the operating segments, which are part of a single reportable segment (see Note 13).

Goodwill is tested for impairment at the reporting unit level during the fourth quarter of each fiscal year. In addition to its annual review, the Company performs a test of impairment when indicators of impairment are present. As of July 28, 2019, there was no indication of impairment of the Company's goodwill balances.

Purchased Intangibles

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



		July 28, 2019							January 27, 2019
(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	$	88,088	$	(64,337	)	$	23,751	$	167,930	$	(136,544	)	$	31,386
Customer relationships	3-10 years	6,001		(4,546		)	1,455		34,031		(31,159		)	2,872
Total finite-lived intangible assets		$	94,089	$	(68,883	)	$	25,206	$	201,961	$	(167,703	)	$	34,258

Amortization expense of finite-lived intangible assets recorded in the Statements of Income for each period was as follows:



	Three Months Ended				Six Months Ended
(in thousands)	July 28, 2019		July 29, 2018		July 28, 2019		July 29, 2018
Core technologies	$	3,475	$	5,047	$	7,634	$	10,575
Customer relationships	433		1,433		1,417		2,866
Total amortization expense	$	3,908	$	6,480	$	9,051	$	13,441

Future amortization expense of finite-lived intangible assets is expected as follows:



(in thousands)
Fiscal Year Ending:	Core Technologies		Customer Relationships		Total
2020 (remaining six months)	$	6,604	$	866	$	7,470
2021	7,389		589		7,978
2022	4,655		—		4,655
2023	3,714		—		3,714
2024	1,389		—		1,389
Thereafter	—		—		—
Total expected amortization expense	$	23,751	$	1,455	$	25,206

The following table sets forth the Company’s indefinite-lived intangible assets resulting from additions to in-process research and development:



(in thousands)	Net Carrying Value
Value at January 27, 2019	$	2,300
In-process research and development through acquisitions	—
Value at July 28, 2019	$	2,300

Indefinite-lived intangible assets are tested for impairment annually on the first day of the fourth quarter or more frequently if events or changes in circumstances (each, a “triggering event”) would more likely than not reduce the carrying value of the asset below its fair value, calculated as the future discounted cash flows that asset is expected to generate. Management did not identify any triggering events during the six months ended July 28, 2019, that would require an interim impairment analysis.