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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2013
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, 2011 |  | $ | 988,702 |  |  | $ | 113,598 |  |  | $ | 368,511 |  |  | $ | 1,470,811 |
Goodwill acquired during 2012 |  |  | 57,451 |  |  |  | 7,328 |  |  |  | — |  |  |  | 64,779 |
Foreign currency translation related to goodwill |  |  | 2,087 |  |  |  | (32 | ) |  |  | — |  |  |  | 2,055 |
Operating unit reorganization |  |  | 16,912 |  |  |  | 16,809 |  |  |  | (33,721 | ) |  |  | — |
Goodwill balance at December 31, 2012 |  |  | 1,065,152 |  |  |  | 137,703 |  |  |  | 334,790 |  |  |  | 1,537,645 |
Goodwill acquired during 2013 |  |  | 112,549 |  |  |  | 143,257 |  |  |  | — |  |  |  | 255,806 |
Foreign currency translation related to goodwill |  |  | (9,617 | ) |  |  | (3,117 | ) |  |  | — |  |  |  | (12,734 | )
Goodwill balance at December 31, 2013 |  | $ | 1,168,084 |  |  | $ | 277,843 |  |  | $ | 334,790 |  |  | $ | 1,780,717 |
Other Intangible Assets | Activity in Quanta’s intangible assets consists of the following (in thousands):
|  | As of December 31, 2012 |  |  | Twelve Months Ended December 31, 2013 |  |  | As of December 31, 2013 |
|  | Intangible Assets |  |  | Accumulated Amortization |  |  | Amortization Expense |  |  | Additions |  |  | Foreign Currency Adjustments |  |  | Intangible Assets, Net |  |  | Remaining Weighted Average Amortization Period in Years |
Customer relationships |  | $ | 170,465 |  |  | $ | (47,777 | ) |  | $ | (12,096 | ) |  | $ | 31,854 |  |  | $ | (2,639 | ) |  | $ | 139,807 |  |  |  | 10.4 |
Backlog |  |  | 126,057 |  |  |  | (119,068 | ) |  |  | (9,698 | ) |  |  | 12,405 |  |  |  | (98 | ) |  |  | 9,598 |  |  |  | 1.3 |
Trade names |  |  | 32,559 |  |  |  | (3,014 | ) |  |  | (1,251 | ) |  |  | 8,321 |  |  |  | (501 | ) |  |  | 36,114 |  |  |  | 23.9 |
Non-compete agreements |  |  | 27,406 |  |  |  | (20,706 | ) |  |  | (2,368 | ) |  |  | 1,944 |  |  |  | (241 | ) |  |  | 6,035 |  |  |  | 3.1 |
Patented rights and developed technology |  |  | 20,931 |  |  |  | (7,517 | ) |  |  | (2,102 | ) |  |  | 600 |  |  |  | (89 | ) |  |  | 11,823 |  |  |  | 5.1 |
Total intangible assets subject to amortization |  |  | 377,418 |  |  |  | (198,082 | ) |  |  | (27,515 | ) |  |  | 55,124 |  |  |  | (3,568 | ) |  |  | 203,377 |  |  |  | 11.8 |
Other intangible assets not subject to amortization |  |  | 4,500 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,500 |  |  |  | N/A |
Total intangible assets |  | $ | 381,918 |  |  | $ | (198,082 | ) |  | $ | (27,515 | ) |  | $ | 55,124 |  |  | $ | (3,568 | ) |  | $ | 207,877 |  |  |  | N/A |
Estimated Future Aggregate Amortization Expense of Intangible Assets | The estimated future aggregate amortization expense of intangible assets as of December 31, 2013 is set forth below (in thousands):
For the Fiscal Year Ending December 31, |  |  |
2014 |  | $ | 27,917 |
2015 |  |  | 19,492 |
2016 |  |  | 18,664 |
2017 |  |  | 17,705 |
2018 |  |  | 17,418 |
Thereafter |  |  | 102,181 |
Total |  | $ | 203,377 |

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