Quarterly report pursuant to Section 13 or 15(d)

Equity - Non-controlling Interests (Detail)

v3.10.0.1
Equity - Non-controlling Interests (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Equity [Abstract]          
Net income attributable to non-controlling interests $ 348 $ 536 $ 1,686 $ 1,232  
Carrying value of the investments held by Quanta in variable interest entities 9,700   9,700   $ 7,800
Non-controlling interests 1,416   1,416   $ 4,058
Distributions to non-controlling interests 1,300 $ 400 2,900 $ 1,800  
Decrease in notes receivable $ 500   $ 1,400