Goodwill and Intangible Assets (Tables)

9 Months Ended

Oct. 25, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amounts of Goodwill

The carrying amounts of goodwill by applicable reporting unit were as follows:

(in thousands)	Signal Integrity		Wireless and Sensing		Protection		Total
Balance at January 26, 2020	$	274,085	$	72,128	$	4,928	$	351,141
Balance at October 25, 2020	$	274,085	$	72,128	$	4,928	$	351,141

Schedule of Acquired Finite-Lived Intangible Assets

The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions, which are amortized over their estimated useful lives:

		October 25, 2020						January 26, 2020
(in thousands, except estimated useful life)	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Core technologies	3-8 years	$	43,300	$	(29,946)	$	13,354	$	82,857	$	(63,434)	$	19,423
Customer relationships		—		—		—		6,000		(5,411)		589
Total finite-lived intangible assets		$	43,300	$	(29,946)	$	13,354	$	88,857	$	(68,845)	$	20,012

Finite-lived Intangible Assets Amortization Expense

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

	Three Months Ended				Nine Months Ended
(in thousands)	October 25, 2020		October 27, 2019		October 25, 2020		October 27, 2019
Core technologies	$	1,798	$	3,337	$	6,069	$	10,971
Customer relationships	—		433		589		1,850
Total amortization expense	$	1,798	$	3,770	$	6,658	$	12,821

Schedule of Future Amortization of Intangible Asset

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

(in thousands)
Fiscal Year Ending:
Fiscal year 2021 (remaining three months)	$	1,608
Fiscal year 2022	4,942
Fiscal year 2023	4,002
Fiscal year 2024	1,676
Fiscal year 2025	288
Thereafter	838
Total expected amortization expense	$	13,354