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Equity - Non-controlling Interests (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Variable Interest Entity [Line Items] |  |  |
Net income attributable to non-controlling interests | $ 547 | $ 997 |
Carrying value of the investments held by Quanta in variable interest entities | 9,600 |  | $ 9,600
Carrying amount of investments held by non-controlling interests in VIEs | 1,313 |  | 1,294
Distributions to non-controlling interests | 528 | 980 |
Discharges of notes receivable |  | $ 500 |
VIE |  |  |
Variable Interest Entity [Line Items] |  |  |
Carrying amount of investments held by non-controlling interests in VIEs | $ 1,300 |  | $ 1,300

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