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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Equity [Abstract]          
Net income attributable to non-controlling interests $ 341 $ 523 $ 1,338 $ 696  
Carrying value of the investments held by Quanta in variable interest entities 10,200   10,200   $ 7,800
Non-controlling interests 2,805   2,805   $ 4,058
Distributions to non-controlling interests 700 $ 400 1,700 $ 1,400  
Decrease in notes receivable $ (500)   $ (900)