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Equity - Non-controlling Interests (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Net income attributable to non-controlling interests | $ 787 |  |  | $ 954 |  |  | $ 4,453 | $ 2,616 |
Carrying amount of investments held by non-controlling interests in VIEs | 3,616 |  |  |  |  |  | 3,616 |  | $ 3,539
Distributions to non-controlling interests | 744 | $ 1,962 | $ 1,963 | $ 489 | $ 1,092 | $ 528 | 4,700 | $ 2,100 |
Primary Beneficiary |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |
Carrying value of the investments held by Quanta in variable interest entities | 12,000 |  |  |  |  |  | 12,000 |  | 12,000
Carrying amount of investments held by non-controlling interests in VIEs | $ 3,600 |  |  |  |  |  | $ 3,600 |  | $ 3,500

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