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Acquisition - Business Acquisition Purchase Price Allocation Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
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Jun. 30, 2014 | Dec. 31, 2013
Business Acquisition [Line Items] |  |
Value of Quanta common stock and exchangeable shares issued | $ 38,641 | $ 88,895
Cash paid | 83,200 | 341,100
All Acquisitions [Member] |  |
Business Acquisition [Line Items] |  |
Value of Quanta common stock and exchangeable shares issued | 38,641 | 88,895
Cash paid | 83,242 | 341,064
Fair value of total consideration transferred | 121,883 | 429,959
Current assets | 53,174 | 193,895
Property and equipment | 33,445 | 60,988
Other assets | 3,374 | 1,009
Identifiable intangible assets | 22,368 | 55,124
Current liabilities | (41,283) | (127,430)
Deferred tax liabilities, net | (3,604) | (4,083)
Other long-term liabilities | (3,935) | (5,350)
Total identifiable net assets | 63,539 | 174,153
Goodwill | 58,344 | 255,806
Fair value of total consideration transferred | $ 121,883 | $ 429,959

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- Definition Amount of consideration transferred, consisting of acquisition date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References No definition available. + Details
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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