Goodwill and Intangible Assets (Tables)

12 Months Ended

Jan. 27, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

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 28, 2018	$	274,085	$	67,812	$	—	$	341,897
Additions ⁽¹⁾	—		4,316		4,928		9,244
Balance at January 27, 2019	$	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 continue to be amortized:



		January 27, 2019							January 28, 2018
(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	$	167,930	$	(136,544	)	$	31,386	$	164,930	$	(115,628	)	$	49,302
Customer relationships	3-10 years	34,031		(31,159		)	2,872		34,031		(25,426		)	8,605
Total finite-lived intangible assets		$	201,961	$	(167,703	)	$	34,258	$	198,961	$	(141,054	)	$	57,907

Schedule of amortization expenses recorded in the Statements of Income

Amortization expenses recorded in the Statements of Income for each period were as follows:



(in thousands)	January 27, 2019		January 28, 2018		January 29, 2017
Core technologies	$	20,916	$	22,688	$	20,901
Customer relationships	5,733		5,179		4,400
Total amortization expense	$	26,649	$	27,867	$	25,301

Schedule of future amortization expense

Future amortization expense is expected to be as follows:



(in thousands)
To be recognized in:	Core Technologies		Customer relationships		Total
Fiscal year 2020	$	14,239	$	2,283	$	16,522
Fiscal year 2021	7,389		589		7,978
Fiscal year 2022	4,655		—		4,655
Fiscal year 2023	3,714		—		3,714
Fiscal year 2024	1,389		—		1,389
Thereafter	—		—		—
Total expected amortization expense	$	31,386	$	2,872	$	34,258

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 29, 2017	$	—
In-process research and development through acquisitions	2,300
Value at January 28, 2018	2,300
Value at January 27, 2019	$	2,300