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Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract] |
Summary of Changes in Quanta's Goodwill | A summary of changes in Quanta’s goodwill is as follows (in thousands):
|  | Electric Power Division |  |  | Oil and Gas Infrastructure Division |  |  | Fiber Optic Licensing Division |  |  | Total |
Goodwill balance at December 31, 2013 |  | $ | 1,168,084 |  |  | $ | 277,843 |  |  | $ | 334,790 |  |  | $ | 1,780,717 |
Goodwill acquired during 2014 |  |  | 47,089 |  |  |  | 7,556 |  |  |  | — |  |  |  | 54,645 |
Foreign currency translation related to goodwill |  |  | (5,261 | ) |  |  | 1,946 |  |  |  | — |  |  |  | (3,315 | )
Goodwill balance at March 31, 2014 |  | $ | 1,209,912 |  |  | $ | 287,345 |  |  | $ | 334,790 |  |  | $ | 1,832,047 |
Other Intangible Assets | Activity in Quanta’s intangible assets consisted of the following (in thousands):
|  | As of |  |  | Three Months Ended |  |  | As of |
|  | December 31, 2013 |  |  | March 31, 2014 |  |  | March 31, 2014 |
|  | Intangible Assets |  |  | Accumulated Amortization |  |  | Amortization Expense |  |  | Additions |  |  | Foreign Currency Adjustments |  |  | Intangible Assets, Net |  |  | Remaining Weighted Average Amortization Period in Years |
Customer relationships |  | $ | 199,224 |  |  | $ | (59,417 | ) |  | $ | (3,650 | ) |  | $ | 11,131 |  |  | $ | 195 |  |  | $ | 147,483 |  |  |  | 10.6 |
Backlog |  |  | 136,831 |  |  |  | (127,233 | ) |  |  | (2,957 | ) |  |  | 4,908 |  |  |  | 730 |  |  |  | 12,279 |  |  |  | 0.9 |
Trade names |  |  | 40,342 |  |  |  | (4,228 | ) |  |  | (466 | ) |  |  | 3,917 |  |  |  | (1,954 | ) |  |  | 37,611 |  |  |  | 22.7 |
Non-compete agreements |  |  | 28,895 |  |  |  | (22,861 | ) |  |  | (652 | ) |  |  | 688 |  |  |  | (71 | ) |  |  | 5,999 |  |  |  | 3.3 |
Patented rights and developed technology |  |  | 21,440 |  |  |  | (9,616 | ) |  |  | (520 | ) |  |  | 404 |  |  |  | (7 | ) |  |  | 11,701 |  |  |  | 5.1 |
Total intangible assets subject to amortization |  |  | 426,732 |  |  |  | (223,355 | ) |  |  | (8,245 | ) |  |  | 21,048 |  |  |  | (1,107 | ) |  |  | 215,073 |  |  |  | 11.6 |
Other intangible assets not subject to amortization |  |  | 4,500 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,500 |  |  |  | N/A |
Total intangible assets |  | $ | 431,232 |  |  | $ | (223,355 | ) |  | $ | (8,245 | ) |  | $ | 21,048 |  |  | $ | (1,107 | ) |  | $ | 219,573 |  |  |  | N/A |
Estimated Future Aggregate Amortization Expense of Intangible Assets | The estimated future aggregate amortization expense of intangible assets as of March 31, 2014 is set forth below (in thousands):
For the Fiscal Year Ending December 31, |  |  |  |
Remainder of 2014 |  | $ | 25,088 |
2015 |  |  | 21,875 |
2016 |  |  | 20,503 |
2017 |  |  | 19,043 |
2018 |  |  | 18,776 |
Thereafter |  |  | 109,788 |
Total |  | $ | 215,073 |

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