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Goodwill and Other Intangible Assets - Summary of Changes in Quanta's Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Goodwill [Line Items] | |||
| Goodwill acquired during the period | $ 64,779 | $ 43,758 | |
| Foreign currency translation related to goodwill | 2,055 | (3,642) | |
| Purchase price adjustments related to prior periods | (61) | ||
| Goodwill | 1,537,645 | 1,470,811 | 1,430,756 |
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Electric Power Division [Member]
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| Goodwill [Line Items] | |||
| Goodwill acquired during the period | 57,451 | 34,900 | |
| Foreign currency translation related to goodwill | 2,087 | (3,564) | |
| Operating unit reorganization | 16,912 | 216,090 | |
| Goodwill | 1,065,152 | 988,702 | 741,276 |
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Natural Gas and Pipeline Division [Member]
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| Goodwill [Line Items] | |||
| Goodwill acquired during the period | 7,328 | 8,858 | |
| Foreign currency translation related to goodwill | (32) | (78) | |
| Operating unit reorganization | 16,809 | (216,090) | |
| Purchase price adjustments related to prior periods | (61) | ||
| Goodwill | 137,703 | 113,598 | 320,969 |
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Fiber Optic Licensing [Member]
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| Goodwill [Line Items] | |||
| Operating unit reorganization | (33,721) | ||
| Goodwill | $ 334,790 | $ 368,511 | $ 368,511 |
| X | ||||||||||
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- Definition
The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Gross amount, as of the balance sheet date, of the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable), in excess of the fair value of net assets acquired in one or more business combination transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of other decrease (increase) in the carrying value of goodwill that is not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The increase (decrease) to the recorded value of goodwill for foreign currency translation adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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