Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

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


	Electric Power Division			Oil and Gas Infrastructure Division			Fiber Optic Licensing Division		Total
Goodwill balance at December 31, 2012	$	1,065,152		$	137,703		$	334,790	$	1,537,645
Goodwill acquired during 2013		112,549			143,257			—		255,806
Foreign currency translation adjustment related to goodwill		(9,617	)		(3,117	)		—		(12,734	)

Goodwill balance at December 31, 2013		1,168,084			277,843			334,790		1,780,717
Goodwill acquired during 2014		71,517			102,968			—		174,485
Foreign currency translation adjustment related to goodwill		(16,377	)		(7,340	)		—		(23,717	)

Goodwill balance at December 31, 2014	$	1,223,224		$	373,471		$	334,790	$	1,931,485

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, 2014							As of December 31, 2013							As of December 31, 2014
	Intangible Assets		Accumulated Amortization			Intangible Assets, Net		Intangible Assets		Accumulated Amortization			Intangible Assets, Net		Remaining Weighted Average Amortization Period in Years
Customer relationships	$	257,380	$	(74,289	)	$	183,091	$	199,224	$	(59,417	)	$	139,807		10.2
Backlog		151,404		(138,460	)		12,944		136,831		(127,233	)		9,598		1.3
Trade names		49,664		(6,278	)		43,386		40,342		(4,228	)		36,114		20.0
Non-compete agreements		31,430		(25,136	)		6,294		28,895		(22,860	)		6,035		3.4
Patented rights and developed technology		22,073		(11,695	)		10,378		21,440		(9,617	)		11,823		4.6

Total intangible assets subject to amortization	$	511,951	$	(255,858	)	$	256,093	$	426,732	$	(223,355	)	$	203,377		11.0

Estimated Future Aggregate Amortization Expense of Intangible Assets

The estimated future aggregate amortization expense of intangible assets as of December 31, 2014 is set forth below (in thousands):


For the Fiscal Year Ending December 31,
2015	$	34,823
2016		28,430
2017		24,553
2018		24,277
2019		23,508
Thereafter		120,502

Total	$	256,093