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Goodwill and Other Intangible Assets - Summary of Changes in Quanta's Goodwill (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014
Goodwill [Line Items] |
Goodwill, beginning balance | $ 1,780,717
Goodwill acquired | 54,645
Foreign currency translation related to goodwill | (3,315)
Goodwill, ending balance | 1,832,047
Electric Power Division [Member] |
Goodwill [Line Items] |
Goodwill, beginning balance | 1,168,084
Goodwill acquired | 47,089
Foreign currency translation related to goodwill | (5,261)
Goodwill, ending balance | 1,209,912
Oil and Gas Infrastructure Division [Member] |
Goodwill [Line Items] |
Goodwill, beginning balance | 277,843
Goodwill acquired | 7,556
Foreign currency translation related to goodwill | 1,946
Goodwill, ending balance | 287,345
Fiber Optic Licensing Division[Member] |
Goodwill [Line Items] |
Goodwill, beginning balance | 334,790
Goodwill acquired |
Foreign currency translation related to goodwill |
Goodwill, ending balance | $ 334,790

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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