Goodwill and Intangible Assets (Tables)

12 Months Ended

Jan. 26, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill balances

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 January 26, 2020	$	274,085	$	72,128	$	4,928	$	351,141

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 are amortized over their estimated useful lives:

		January 26, 2020							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	3-8 years	$	82,857	$	(63,434	)	$	19,423	$	167,930	$	(136,544	)	$	31,386
Customer relationships	3-5 years	6,000		(5,411		)	589		34,031		(31,159		)	2,872
Total finite-lived intangible assets		$	88,857	$	(68,845	)	$	20,012	$	201,961	$	(167,703	)	$	34,258

Schedule of amortization expenses recorded in the Statements of Income

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

(in thousands)	January 26, 2020		January 27, 2019		January 28, 2018
Core technologies	$	14,263	$	20,916	$	22,688
Customer relationships	2,283		5,733		5,179
Total amortization expense	$	16,546	$	26,649	$	27,867

Schedule of future amortization expense

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

(in thousands)
To be recognized in:	Core Technologies		Customer relationships		Total
Fiscal year 2021	$	7,677	$	589	$	8,266
Fiscal year 2022	4,942		—		4,942
Fiscal year 2023	4,002		—		4,002
Fiscal year 2024	1,676		—		1,676
Fiscal year 2025	1,126		—		1,126
Total expected amortization expense	$	19,423	$	589	$	20,012

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 Amount
Value at January 28, 2018	$	2,300
Value at January 27, 2019	2,300
Transfers to core technologies	(2,300		)
Value at January 26, 2020	$	—