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Business and Organization - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 12 Months Ended
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Jun. 30, 2012 Entity | Dec. 31, 2011 Entity | Dec. 31, 2013 Segment Entity | Dec. 31, 2012 Entity | Dec. 31, 2011 Entity
Organization And Description Of Business [Line Items] |  |  |  |  |
Number of reportable segments |  |  | 3 |  |
Fiber Optic Licensing Terms, Minimum in years |  |  | 5 years | 5 years |
Fiber Optic Licensing Terms, Maximum in years |  |  | 25 years | 25 years |
Number of business acquisitions completed | 4 | 5 | 6 | 4 | 5
Proceeds from sale of subsidiary |  |  |  | $ 265.0 |
Electric Power Division [Member] | Canada [Member] |  |  |  |  |
Organization And Description Of Business [Line Items] |  |  |  |  |
Number of business acquisitions completed | 1 | 3 |  |  | 3
Electric Power Division [Member] | United States [Member] |  |  |  |  |
Organization And Description Of Business [Line Items] |  |  |  |  |
Number of business acquisitions completed | 2 | 1 |  |  | 1
Oil and Gas Infrastructure Division [Member] | United States [Member] |  |  |  |  |
Organization And Description Of Business [Line Items] |  |  |  |  |
Number of business acquisitions completed | 1 |  |  |  |
Oil and Gas Infrastructure Division [Member] | Australia [Member] |  |  |  |  |
Organization And Description Of Business [Line Items] |  |  |  |  |
Number of business acquisitions completed |  | 1 |  |  | 1

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- Definition Maximum Licensing Terms + References No definition available. + Details
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- Definition Minimum Licensing Terms + References No definition available. + Details
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- Details
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- Definition The number of businesses acquired by the entity during the period. + References No definition available. + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Definition This element represents the cash inflow during the period from the sale of a component of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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