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Goodwill and Acquired Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Changes in Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill by reportable segments for the three months ended March 31, 2019, were as follows:

		Industrial Automation				System Test				Wireless Test				Semiconductor Test				Total
		(in thousands)
Balance at December 31, 2018
Goodwill		$	363,358			$	158,699			$	361,819			$	260,540			$	1,144,416
Accumulated impairment losses			—				(148,183	)			(353,843	)			(260,540	)			(762,566	)
			363,358				10,516				7,976				—				381,850
Lemsys acquisition			—				—				—				1,145				1,145
Foreign currency translation adjustment			(3,494	)			—				—				12				(3,482	)
Balance at March 31, 2019
Goodwill			359,864				158,699				361,819				261,697				1,142,079
Accumulated impairment losses			—				(148,183	)			(353,843	)			(260,540	)			(762,566	)
		$	359,864			$	10,516			$	7,976			$	1,157			$	379,513

Schedule of Amortizable Intangible Assets

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

		March 31, 2019
		Gross Carrying Amount (1)				Accumulated Amortization				Foreign Currency Translation Adjustment				Net Carrying Amount
		(in thousands)
Developed technology		$	337,218			$	(259,129	)		$	(4,812	)		$	73,277
Customer relationships			100,743				(85,469	)			(408	)			14,866
Tradenames and trademarks			64,670				(32,897	)			(973	)			30,800
Non-compete agreement			320				(320	)			—				—
Backlog			780				(349	)			(2	)			429
Total intangible assets		$	503,731			$	(378,164	)		$	(6,195	)		$	119,372

		December 31, 2018
		Gross Carrying Amount				Accumulated Amortization				Foreign Currency Translation Adjustment				Net Carrying Amount
		(in thousands)
Developed technology		$	336,308			$	(252,080	)		$	(4,079	)		$	80,149
Customer relationships			97,153				(83,448	)			(340	)			13,365
Tradenames and trademarks			64,420				(31,653	)			(799	)			31,968
Non-compete agreement			320				(320	)			—				—
Backlog			30				(30	)			—				—
Total intangible assets		$	498,231			$	(367,531	)		$	(5,218	)		$	125,482

(1)

Includes $5.5 million of intangible assets

from Lemsys acquisition.

Schedule of Estimated Intangible Assets Amortization Expense

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

Year		Amortization Expense
		(in thousands)
2019 (remainder)			29,184
2020			24,852
2021			14,707
2022			13,815
2023			13,339
Thereafter			23,475