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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 38,611	$ 48,440
Other comprehensive income (loss), net of tax provision:
Foreign currency translation adjustment, net of tax of $0 and $0	(25,014)	13,821
Other comprehensive income (loss)	(25,014)	13,821
Comprehensive income	13,597	62,261
Less: Comprehensive income attributable to non-controlling interests	997	173
Total comprehensive income attributable to Quanta stockholders	$ 12,600	$ 62,088

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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