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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2012
Summary of Changes in Quanta's Goodwill | A summary of changes in Quanta’s goodwill is as follows (in thousands):
|  | Electric Power Division |  |  | Natural Gas and Pipeline Division |  |  | Fiber Optic Licensing and Other Division |  |  | Total |
Balance at December 31, 2010: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 741,276 |  |  | $ | 320,969 |  |  | $ | 368,511 |  |  | $ | 1,430,756 |
Goodwill acquired during 2011 |  |  | 34,900 |  |  |  | 8,858 |  |  |  | — |  |  |  | 43,758 |
Foreign currency translation related to goodwill |  |  | (3,564 | ) |  |  | (78 | ) |  |  | — |  |  |  | (3,642 | )
Operating unit reorganization |  |  | 216,090 |  |  |  | (216,090 | ) |  |  | — |  |  |  | — |
Purchase price adjustments related to prior periods |  |  | — |  |  |  | (61 | ) |  |  | — |  |  |  | (61 | )
Balance at December 31, 2011: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 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 reorganizations |  |  | 16,912 |  |  |  | 16,809 |  |  |  | (33,721 | ) |  |  | — |
Balance at December 31, 2012: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 1,065,152 |  |  | $ | 137,703 |  |  | $ | 334,790 |  |  | $ | 1,537,645 |
Other Intangible Assets | Activity in Quanta’s intangible assets consists of the following (in thousands):
|  | As of December 31, 2011 |  |  | Twelve Months Ended December 31, 2012 |  |  | As of December 31, 2012 |
|  | Intangible Assets |  |  | Accumulated Amortization |  |  | Amortization Expense |  |  | Additions |  |  | Foreign Currency Translation |  |  | Intangible Assets, Net |  |  | Remaining Weighted Average Amortization Period |
Customer relationships |  | $ | 164,259 |  |  | $ | (36,300 | ) |  | $ | (11,180 | ) |  | $ | 5,311 |  |  | $ | 598 |  |  | $ | 122,688 |  |  |  | 11.2 |
Backlog |  |  | 120,682 |  |  |  | (100,056 | ) |  |  | (18,944 | ) |  |  | 4,906 |  |  |  | 401 |  |  |  | 6,989 |  |  |  | 2.1 |
Trade names |  |  | 29,661 |  |  |  | (1,948 | ) |  |  | (1,064 | ) |  |  | 2,768 |  |  |  | 128 |  |  |  | 29,545 |  |  |  | 27.2 |
Non-compete agreements |  |  | 25,392 |  |  |  | (16,154 | ) |  |  | (4,523 | ) |  |  | 1,926 |  |  |  | 59 |  |  |  | 6,700 |  |  |  | 3.2 |
Patented rights and developed technology |  |  | 16,378 |  |  |  | (5,538 | ) |  |  | (1,980 | ) |  |  | 4,561 |  |  |  | (7 | ) |  |  | 13,414 |  |  |  | 6.8 |
Total intangible assets subject to amortization |  |  | 356,372 |  |  |  | (159,996 | ) |  |  | (37,691 | ) |  |  | 19,472 |  |  |  | 1,179 |  |  |  | 179,336 |  |  |  | 12.9 |
Other intangible assets not subject to amortization |  |  | 4,500 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,500 |  |  |  | N/A |
Total intangible assets |  | $ | 360,872 |  |  | $ | (159,996 | ) |  | $ | (37,691 | ) |  | $ | 19,472 |  |  | $ | 1,179 |  |  | $ | 183,836 |  |  |  | N/A |
Estimated Future Aggregate Amortization Expense of Intangible Assets | The estimated future aggregate amortization expense of intangible assets as of December 31, 2012 is set forth below (in thousands):
For the Fiscal Year Ending December 31, |  |  |
2013 |  | $ | 20,197 |
2014 |  |  | 18,340 |
2015 |  |  | 15,994 |
2016 |  |  | 15,122 |
2017 |  |  | 14,132 |
Thereafter |  |  | 95,551 |
Total |  | $ | 179,336 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 47 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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