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Business and Organization (Details) | 12 Months Ended
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Dec. 31, 2020 Segment | Dec. 31, 2019 division | Dec. 31, 2018 division
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Number of reportable segments | Segment | 2 |  |
Number of specialty utility foundation and pole-setting contractors |  | 2 |
Number of communications infrastructure services businesses |  |  | 2

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- Definition Number Of Communications Infrastructure Services Businesses + References No definition available. + Details
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- Definition Number Of Special Utility Foundation And Pole-Setting Contractors + 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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599 + Details
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