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Equity - Non-controlling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Variable Interest Entity [Line Items]
Net income attributable to non-controlling interests	$ 2,817	$ 547
Carrying amount of investments held by non-controlling interests in VIEs	4,686		$ 3,539
Distributions to non-controlling interests	1,963	$ 528
Primary Beneficiary
Variable Interest Entity [Line Items]
Carrying value of the investments held by Quanta in variable interest entities	13,100		9,600
Carrying amount of investments held by non-controlling interests in VIEs	$ 4,700		$ 3,500

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