Goodwill and Acquired Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Changes in Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill by reportable segments for the nine months ended September 30, 2018, were as follows:

	Wireless Test			Industrial Automation			System Test			Semiconductor Test			Total
	(in thousands)
Balance at December 31, 2017
Goodwill	$	361,819		$	233,519		$	158,699		$	260,540		$	1,014,577
Accumulated impairment losses		(353,843	)		—			(148,183	)		(260,540	)		(762,566	)
		7,976			233,519			10,516			—			252,011
MiR acquisition		—			134,737			—			—			134,737
Energid acquisition		—			14,394			—			—			14,394
Foreign currency translation adjustment		—			(8,144	)		—			—			(8,144	)
Balance at September 30, 2018
Goodwill		361,819			374,506			158,699			260,540			1,155,564
Accumulated impairment losses		(353,843	)		—			(148,183	)		(260,540	)		(762,566	)
	$	7,976		$	374,506		$	10,516		$	—		$	392,998

Schedule of Estimated Intangible Asset Amortization Expense

Estimated intangible asset amortization expense for each of the five succeeding fiscal years is as follows:

Year	Amortization Expense
	(in thousands)
2018 (remainder)		10,731
2019		39,610
2020		24,928
2021		14,343
2022		13,450
Thereafter		36,901

Wireless Test

Schedule of Amortizable Intangible Assets

Amortizable intangible assets consist of the following and are included in intangible assets, net on the balance sheet:

	September 30, 2018
	Gross Carrying Amount (1)(2)		Accumulated Amortization (2)			Foreign Currency Translation Adjustment			Net Carrying Amount
	(in thousands)
Developed technology	$	336,306	$	(244,833	)	$	(1,117	)	$	90,356
Customer relationships		105,622		(89,848	)		(83	)		15,691
Tradenames and trademarks		64,420		(30,408	)		(96	)		33,916
Non-compete agreement		320		(320	)		—			—
Backlog		30		(30	)		—			—
Total intangible assets	$	506,698	$	(365,439	)	$	(1,296	)	$	139,963

	December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Foreign Currency Translation Adjustment		Net Carrying Amount
	(in thousands)
Developed technology	$	270,877	$	(226,190	)	$	1,618	$	46,305
Customer relationships		92,741		(83,585	)		171		9,327
Tradenames and trademarks		50,100		(27,120	)		416		23,396
Non-compete agreement		320		(260	)		—		60
Total intangible assets	$	414,038	$	(337,155	)	$	2,205	$	79,088

(1) Includes intangible assets acquired in 2018, $80.7 million from the MiR acquisition and $12.3 million from the Energid acquisition.

(2) In 2018, $0.3 million of amortizable intangible assets became fully amortized and have been eliminated from the gross carrying amount and accumulated amortization.