|
Goodwill and Other Intangible Assets - Summary of Changes in Quanta's Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified |
6 Months Ended |
|---|---|
|
Jun. 30, 2014
|
|
| Goodwill [Line Items] | |
| Goodwill, beginning balance | $ 1,780,717 |
| Goodwill acquired | 58,344 |
| Foreign currency translation related to goodwill | 3,928 |
| Goodwill, ending balance | 1,842,989 |
|
Electric Power Division [Member]
|
|
| Goodwill [Line Items] | |
| Goodwill, beginning balance | 1,168,084 |
| Goodwill acquired | 50,788 |
| Foreign currency translation related to goodwill | 1,111 |
| Goodwill, ending balance | 1,219,983 |
|
Oil and Gas Infrastructure Division [Member]
|
|
| Goodwill [Line Items] | |
| Goodwill, beginning balance | 277,843 |
| Goodwill acquired | 7,556 |
| Foreign currency translation related to goodwill | 2,817 |
| Goodwill, ending balance | 288,216 |
|
Fiber Optic Licensing Division[Member]
|
|
| Goodwill [Line Items] | |
| Goodwill, beginning balance | 334,790 |
| Goodwill acquired | 0 |
| Foreign currency translation related to goodwill | 0 |
| Goodwill, ending balance | $ 334,790 |