Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 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
Goodwill balance at December 31, 2014	$	1,223,224		$	373,471		$	1,596,695
Goodwill acquired during 2015		31,224			20,636			51,860
Purchase price allocation adjustments		750			(8,867	)		(8,117	)
Goodwill impaired during 2015		—			(39,826	)		(39,826	)
Foreign currency translation adjustments		(28,953	)		(19,001	)		(47,954	)

Balance at December 31, 2015:
Goodwill		1,226,245			366,306			1,592,551
Accumulated impairment		—			(39,893	)		(39,893	)

Goodwill, net		1,226,245			326,413			1,552,658
Goodwill acquired during 2016		24,168			21,018			45,186
Purchase price allocation adjustments		229			(214	)		15
Foreign currency translation adjustments		3,337			1,973			5,310

Balance at December 31, 2016:
Goodwill		1,253,979			388,923			1,642,902
Accumulated impairment		—			(39,733	)		(39,733	)

Goodwill, net	$	1,253,979		$	349,190		$	1,603,169

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 December 31, 2016							As of December 31, 2015							As of December 31, 2016
	Intangible Assets		Accumulated Amortization			Intangible Assets, Net		Intangible Assets		Accumulated Amortization			Intangible Assets, Net		Remaining Weighted Average Amortization Period in Years
Customer relationships	$	244,329	$	(110,640	)	$	133,689	$	236,731	$	(90,840	)	$	145,891		8.7
Backlog		133,592		(132,441	)		1,151		130,818		(126,954	)		3,864		1.3
Trade names		54,723		(12,855	)		41,868		51,192		(9,525	)		41,667		17.7
Non-compete agreements		29,212		(25,546	)		3,666		28,560		(23,507	)		5,053		3.1
Patented rights and developed technology		22,480		(15,831	)		6,649		22,447		(13,848	)		8,599		4.2

Total intangible assets subject to amortization	$	484,336	$	(297,313	)	$	187,023	$	469,748	$	(264,674	)	$	205,074		10.4

Estimated Future Aggregate Amortization Expense of Intangible Assets

The estimated future aggregate amortization expense of intangible assets subject to amortization as of December 31, 2016 is set forth below (in thousands):


For the Fiscal Year Ending December 31,
2017	$	25,574
2018		24,265
2019		22,227
2020		20,948
2021		18,620
Thereafter		75,389

Total	$	187,023