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Summary of Significant Accounting Policies - Goodwill (Details) | 3 Months Ended | 12 Months Ended |
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Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) Reporting_Unit | Dec. 31, 2020 USD ($) division | Dec. 31, 2020 USD ($) Divisions | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill sensitivity analysis |  |  |  |  | 10.00% |  |  |  |  |  |
Number of reporting units at risk after cushion test | Reporting_Unit |  |  |  |  |  | 3 |  |  |  |  |
Number of internal divisions |  |  |  |  |  |  | 2 | 2 |  |  |
Asset impairment charges |  |  |  | $ 8,282,000 |  |  |  |  | $ 13,892,000 | $ 49,375,000 |
Non-cash charge for impairment of goodwill | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |  |
Goodwill | 2,121,014,000 | 2,022,675,000 | 1,899,879,000 | 2,121,014,000 | $ 2,121,014,000 | $ 2,121,014,000 | $ 2,121,014,000 | $ 2,121,014,000 | 2,022,675,000 | 1,899,879,000 | $ 1,868,600,000
Intangible assets | 435,655,000 | 413,734,000 |  | 435,655,000 | 435,655,000 | $ 435,655,000 | 435,655,000 | 435,655,000 | 413,734,000 |  |
Underground Utility and Infrastructure Solutions |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reporting units at risk after cushion test | Reporting_Unit |  |  |  |  |  | 2 |  |  |  |  |
Goodwill | 671,240,000 | $ 657,512,000 | $ 586,801,000 | 671,240,000 | 671,240,000 | $ 671,240,000 | 671,240,000 | 671,240,000 | $ 657,512,000 | $ 586,801,000 | $ 596,073,000
Underground Utility and Infrastructure Solutions | Two Canadian Pipeline Operating Businesses And United State Material Handling Services |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 99,800,000 |  |  | 99,800,000 | 99,800,000 | 99,800,000 | 99,800,000 | 99,800,000 |  |  |
Intangible assets | 19,500,000 |  |  | 19,500,000 | 19,500,000 | 19,500,000 | 19,500,000 | 19,500,000 |  |  |
Underground Utility and Infrastructure Solutions | Specialized Industrial Services Business |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 303,000,000.0 |  |  | 303,000,000.0 | 303,000,000.0 | 303,000,000.0 | 303,000,000.0 | 303,000,000.0 |  |  |
Intangible assets | $ 53,300,000 |  |  | $ 53,300,000 | $ 53,300,000 | $ 53,300,000 | $ 53,300,000 | $ 53,300,000 |  |  |

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