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Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Changes in Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill by reportable segments for the years ended December 31, 2016 and 2015 are as follows:

		Industrial Automation				System Test				Wireless Test				Semiconductor Test				Total
		(in thousands)
Balance at December 31, 2014:
Goodwill		$	—			$	158,699			$	361,819			$	260,540			$	781,058
Accumulated impairment losses			—				(148,183	)			(98,897	)			(260,540	)			(507,620	)
			—				10,516				262,922				—				273,438
Universal Robots acquisition			221,128				—				—				—				221,128
Foreign currency translation adjustment			(6,153	)			—				—				—				(6,153	)
Balance at December 31, 2015:
Goodwill			214,975				158,699				361,819				260,540				996,033
Accumulated impairment losses			—				(148,183	)			(98,897	)			(260,540	)			(507,620	)
			214,975				10,516				262,922				—				488,413
Foreign currency translation adjustment			(10,124	)			—				—				—				(10,124	)
Goodwill impairment losses			—				—				(254,946	)			—				(254,946	)
Balance at December 31, 2016:
Goodwill			204,851				158,699				361,819				260,540				985,909
Accumulated impairment losses			—				(148,183	)			(353,843	)			(260,540	)			(762,566	)
		$	204,851			$	10,516			$	7,976			$	—			$	223,343

Schedule of Amortizable Intangible Assets

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

		December 31, 2016
		Gross Carrying Amount (1)				Accumulated Amortization  (1)(2)				Foreign Currency Translation Adjustment				Net Carrying Amount				Weighted Average Useful Life
		(in thousands)
Developed technology		$	270,877			$	206,376			$	(5,093	)		$	59,408				6.0 years
Customer relationships			92,741				76,707				(538	)			15,496				7.9 years
Tradenames and trademarks			50,100				23,435				(1,308	)			25,357				9.5 years
Non-compete agreement			320				180				—				140				4.0 years
Customer backlog			170				170				—				—				0.3 years
Total intangible assets		$	414,208			$	306,868			$	(6,939	)		$	100,401				6.8 years

(1) During the year ended December 31, 2016, Teradyne recorded an $83.3 million impairment of Wireless Test amortizable intangible assets. The impairment assets have been eliminated from the gross carrying amount and accumulated amortization.

(2) In 2016, $48.1 million of amortizable intangible assets became fully amortized and has been eliminated from the gross carrying amount and accumulated amortization.

		December 31, 2015
		Gross Carrying Amount				Accumulated Amortization  (1)(2)				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

(1) During the year ended December 31, 2015, Teradyne recorded intangible assets in the amount of $121.6 million related to its Universal Robots acquisition.

(2) During the year ended December 31, 2015, Teradyne wrote off $98.2 million of fully amortized intangible assets.

Schedule of Estimated Intangible Assets Amortization Expense

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

Year		Amortization Expense
		(in thousands)
2017		$	28,986
2018			26,848
2019			23,037
2020			10,042
2021			3,435
Thereafter			8,053

X

- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
-Paragraph 1
-Subparagraph (a)
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X

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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