Goodwill and Intangible Assets

3 Months Ended

Mar. 27, 2021

Goodwill by reportable segment was as follows (in thousands):


	Probe Cards		Systems		Total
Goodwill, gross, as of December 28, 2019	$	172,482	$	26,714	$	199,196
Addition - FRT GmbH Acquisition	—		975		975
Addition - Baldwin Park Acquisition	5,590		—		5,590
Addition - HPD Acquisition	—		4,654		4,654
Foreign currency translation	—		2,346		2,346
Goodwill, gross, as of December 26, 2020	178,072		34,689		212,761
Addition - Baldwin Park Acquisition	352				352
Addition - HPD Acquisition	—		2,011		2,011
Foreign currency translation	—		(906)		(906)
Goodwill, gross, as of March 27, 2021	$	178,424	$	35,794	$	214,218

We have not recorded goodwill impairments for the three months ended March 27, 2021.

Intangible assets were as follows (in thousands):


	March 27, 2021						December 26, 2020
Intangible Assets	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Developed technologies	$	173,318	$	142,344	$	30,974	$	176,265	$	137,754	$	38,511
Trade names	8,100		7,418		682		8,162		7,363		799
Customer relationships	51,557		34,899		16,658		52,488		33,378		19,110
Backlog	1,969		1,897		72		2,227		1,900		327
In-process research and development	400		—		400		400		—		400
	$	235,344	$	186,558	$	48,786	$	239,542	$	180,395	$	59,147

Amortization expense was included in our Condensed Consolidated Statements of Income as follows (in thousands):


	Three Months Ended
	March 27, 2021		March 28, 2020
Cost of revenues	$	5,090	$	5,750
Selling, general and administrative	1,715		1,513
	$	6,805	$	7,263

The estimated future amortization of definite-lived intangible assets, excluding in-process research and development, is as follows (in thousands):