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Goodwill and Other Intangible Assets - Summary of Changes in Quanta's Goodwill (Detail) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 USD ($)
Goodwill [Line Items] |
Goodwill gross, beginning balance | $ 1,642,902
Accumulated impairment, beginning balance | (39,733)
Goodwill, beginning balance | 1,603,169
Purchase price allocation adjustments | (659)
Foreign currency translation adjustments | 5,874
Goodwill gross, ending balance | 1,648,884
Accumulated impairment, ending balance | (40,500)
Goodwill, ending balance | 1,608,384
Electric Power Division [Member] |
Goodwill [Line Items] |
Goodwill gross, beginning balance | 1,253,979
Accumulated impairment, beginning balance | 0
Goodwill, beginning balance | 1,253,979
Purchase price allocation adjustments | 0
Foreign currency translation adjustments | 3,354
Goodwill gross, ending balance | 1,257,333
Accumulated impairment, ending balance | 0
Goodwill, ending balance | 1,257,333
Oil and Gas Infrastructure Division [Member] |
Goodwill [Line Items] |
Goodwill gross, beginning balance | 388,923
Accumulated impairment, beginning balance | (39,733)
Goodwill, beginning balance | 349,190
Purchase price allocation adjustments | (659)
Foreign currency translation adjustments | 2,520
Goodwill gross, ending balance | 391,551
Accumulated impairment, ending balance | (40,500)
Goodwill, ending balance | $ 351,051

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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 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits 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=35741047&loc=d3e13816-109267 + Details
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