Quarterly report pursuant to Section 13 or 15(d)

Equity - Non-controlling Interests (Detail)

v3.7.0.1
Equity - Non-controlling Interests (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Equity [Abstract]          
Net income attributable to non-controlling interests $ 523 $ 167 $ 696 $ 530  
Carrying value of the investments held by Quanta in variable interest entities 2,600   2,600   $ 3,300
Non-controlling interests 2,608   2,608   $ 3,275
Distributions to non-controlling interests $ 400 $ 0 $ 1,400 $ 0