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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Significant Estimates Used by Management in Determining Fair Values of Intangible Assets

The following table presents the significant estimates used by management in determining the fair values of customer relationships associated with acquisitions in the nine months ended September 30, 2018 and year ended December 31, 2017:

		2018		2017
Discount rates		20% to 27%		17% to 25%
Customer attrition rates		20% to 33%		15% to 78%

Revenue Disaggregated by Geographic Location and Contract Type

The following tables present Quanta’s revenue disaggregated by geographic location and contract type for the three and nine months ended September 30, 2018 (in thousands):

		Three Months Ended				Nine Months Ended
		September 30, 2018				September 30, 2018
By primary geographic location:
United States		$	2,317,643			$	6,223,507
Canada		522,618				1,376,149
Australia		75,055				308,392
Latin America and Other		69,965				151,157
Total revenues		$	2,985,281			$	8,059,205

		Three Months Ended				Nine Months Ended
		September 30, 2018				September 30, 2018
By contract type:
Unit-price contracts		$	1,082,858			$	2,714,441
Fixed price contracts		1,239,666				3,497,746
Cost-plus contracts		662,757				1,847,018
Total revenues		$	2,985,281			$	8,059,205

Contract Assets and Liabilities

Contract assets and liabilities consisted of the following (in thousands):

		September 30, 2018				December 31, 2017
Contract assets		$	680,006			$	497,292
Contract liabilities		$	452,491			$	433,387

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