Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

A summary of changes in Quanta’s goodwill is as follows (in thousands):


	Electric Power Infrastructure Services Division		Oil and Gas Infrastructure Services Division			Total
Balance at December 31, 2015:
Goodwill	$	1,226,245	$	366,306		$	1,592,551
Accumulated impairment		—		(39,893	)		(39,893	)

		1,226,245		326,413			1,552,658
Goodwill acquired during 2016		24,074		20,536			44,610
Purchase price allocation adjustments ⁽¹⁾		293		(214	)		79
Foreign currency translation adjustments		9,073		5,818			14,891

Balance at September 30, 2016:
Goodwill		1,259,685		393,108			1,652,793
Accumulated impairment		—		(40,555	)		(40,555	)

	$	1,259,685	$	352,553		$	1,612,238

⁽¹⁾	Adjustments primarily represent changes in deferred tax liability estimates and would have had no impact on the consolidated financial statements in prior periods had these adjustments been booked at the respective acquisition dates.

Other Intangible Assets

Quanta’s intangible assets subject to amortization and the remaining weighted average amortization periods related to such assets were as follows (in thousands except for weighted average amortization periods, which are in years):


	As of							As of							As of
	September 30, 2016							December 31, 2015							September 30, 2016
	Intangible Assets		Accumulated Amortization			Intangible Assets, Net		Intangible Assets		Accumulated Amortization			Intangible Assets, Net		Remaining Weighted Average Amortization Period in Years
Customer relationships	$	247,252	$	(106,586	)	$	140,666	$	236,731	$	(90,840	)	$	145,891		8.9
Backlog		134,579		(132,082	)		2,497		130,818		(126,954	)		3,864		0.8
Trade names		55,260		(12,144	)		43,116		51,192		(9,525	)		41,667		17.8
Non-compete agreements		29,425		(25,291	)		4,134		28,560		(23,507	)		5,053		3.2
Patented rights and developed technology		22,501		(15,358	)		7,143		22,447		(13,848	)		8,599		4.4

Total intangible assets subject to amortization	$	489,017	$	(291,461	)	$	197,556	$	469,748	$	(264,674	)	$	205,074		10.5

Estimated Future Aggregate Amortization Expense of Intangible Assets

The estimated future aggregate amortization expense of intangible assets subject to amortization as of September 30, 2016 is set forth below (in thousands):


For the Fiscal Year Ending December 31,
Remainder of 2016	$	8,013
2017		25,880
2018		24,541
2019		22,496
2020		21,193
Thereafter		95,433

Total	$	197,556