Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

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



	Electric Power Infrastructure Services Division			Pipeline and Industrial Infrastructure Services Division			Total
Balance at December 31, 2017:
Goodwill	$	1,272,527		$	693,905		$	1,966,432
Accumulated impairment	—			(97,832		)	(97,832		)
	1,272,527			596,073			1,868,600

Goodwill recorded related to 2018 acquisitions	56,337			—			56,337
Purchase price allocation adjustments	51			—			51
Foreign currency translation adjustments	(15,837		)	(9,272		)	(25,109		)

Balance at December 31, 2018:
Goodwill	1,313,078			683,284			1,996,362
Accumulated impairment	—			(96,483		)	(96,483		)
	1,313,078			586,801			1,899,879

Goodwill recorded related to 2019 acquisition	21,909			—			21,909
Foreign currency translation adjustments	3,470			1,770			5,240

Balance at March 31, 2019:
Goodwill	1,338,457			685,137			2,023,594
Accumulated impairment	—			(96,566		)	(96,566		)
	$	1,338,457		$	588,571		$	1,927,028

Other Intangible Assets

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



	As of							As of							As of
	March 31, 2019							December 31, 2018							March 31, 2019
	Intangible Assets		Accumulated Amortization			Intangible Assets, Net		Intangible Assets		Accumulated Amortization			Intangible Assets, Net		Remaining Weighted Average Amortization Period in Years
Customer relationships	$	358,177	$	(172,528	)	$	185,649	$	359,967	$	(165,715	)	$	194,252	5.9
Backlog	136,780		(135,348		)	1,432		135,578		(134,592		)	986		0.7
Trade names	82,254		(22,916		)	59,338		81,058		(21,559		)	59,499		15.2
Non-compete agreements	40,797		(29,905		)	10,892		40,728		(30,168		)	10,560		3.3
Patented rights and developed technology	32,017		(24,597		)	7,420		22,482		(19,175		)	3,307		2.6
Curriculum	9,448		(1,109		)	8,339		9,448		(872		)	8,576		8.8
Total intangible assets subject to amortization	659,473		(386,403		)	273,070		649,261		(372,081		)	277,180		7.8
Engineering license	3,000		—			3,000		3,000		—			3,000
Total intangible assets	$	662,473	$	(386,403	)	$	276,070	$	652,261	$	(372,081	)	$	280,180

Estimated Future Aggregate Amortization Expense of Intangible Assets

The estimated future aggregate amortization expense of intangible assets subject to amortization as of March 31, 2019 is set forth below (in thousands):



Year Ending December 31:
Remainder of 2019	$	36,849
2020	46,651
2021	44,131
2022	40,359
2023	32,242
Thereafter	72,838
Total	$	273,070