Goodwill and Intangible Assets (Tables)

6 Months Ended

Jul. 03, 2016

Changes in Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill by reportable segments for the six months ended July 3, 2016, were as follows:

	Wireless Test			Industrial Automation		System Test			Semiconductor Test			Total
	(in thousands)
Balance at December 31, 2015:
Goodwill	$	361,819		$	214,975	$	158,699		$	260,540		$	996,033
Accumulated impairment losses		(98,897	)		—		(148,183	)		(260,540	)		(507,620	)
		262,922			214,975		10,516			—			488,413
Foreign currency translation adjustment		—			3,743		—			—			3,743
Goodwill impairment loss		(254,946	)		—		—			—			(254,946	)
Balance at July 3, 2016:
Goodwill		361,819			218,718		158,699			260,540			999,776
Accumulated impairment losses		(353,843	)		—		(148,183	)		(260,540	)		(762,566	)
	$	7,976		$	218,718	$	10,516		$	—		$	237,210

Schedule of Amortizable Intangible Assets

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

	July 3, 2016
	Gross Carrying Amount (1)		Accumulated Amortization (1)(2)		Foreign Currency Translation Adjustment			Net Carrying Amount		Weighted Average Useful Life
	(in thousands)
Developed technology	$	333,421	$	259,364		(1,138	)	$	72,919		6.0 years
Customer relationships		110,602		89,674		(119	)		20,809		7.9 years
Tradenames and trademarks		53,034		24,581		(292	)		28,161		9.5 years
Non-compete agreement		320		140		—			180		4.0 years
Customer backlog		170		170		—			—		0.3 years
Total intangible assets	$	497,547	$	373,929		(1,549	)	$	122,069		6.8 years

(1) In 2016, $48 million of amortizable intangible assets became fully amortized and have been eliminated from the gross carrying amount and accumulated amortization.

(2) Includes an $83 million impairment of Wireless Test amortizable intangible assets.

	December 31, 2015
	Gross Carrying Amount		Accumulated Amortization		Foreign Currency Translation Adjustment			Net Carrying Amount		Weighted Average Useful Life
	(in thousands)
Developed technology	$	382,262	$	220,346		(2,444	)	$	159,472		6.0 years
Customer relationships		110,602		63,722		(258	)		46,622		7.9 years
Tradenames and trademarks		53,034		18,889		(628	)		33,517		9.5 years
Non-compete agreement		320		100		—			220		4.0 years
Customer backlog		170		170		—			—		0.3 years
Total intangible assets	$	546,388	$	303,227		(3,330	)	$	239,831		6.7 years

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)
2016 (remainder)	$	16,519
2017		30,410
2018		28,142
2019		24,244
2020		10,626
Thereafter		12,128