Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details)

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Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Sep. 30, 2021
USD ($)
unit
Dec. 31, 2020
USD ($)
unit
Goodwill [Line Items]      
Goodwill impairment loss $ 0 $ 0  
Impairment of other intangible assets 0 0  
Decrease in fair value of reporting units considered for impairment     10.00%
Goodwill 2,145,963,000 2,145,963,000 $ 2,121,014,000
Other intangible assets 388,999,000 $ 388,999,000 $ 435,655,000
Underground Utility and Infrastructure Solutions | Two Canadian Pipeline Operating Businesses      
Goodwill [Line Items]      
Number of reporting units at risk after cushion test | unit     2
Underground Utility and Infrastructure Solutions | Two Canadian Pipeline Operating Businesses And United States Material Handling Services      
Goodwill [Line Items]      
Number of reporting units at risk after cushion test | unit   3  
Goodwill 100,100,000 $ 100,100,000  
Other intangible assets 16,000,000 16,000,000  
Underground Utility and Infrastructure Solutions | Specialized Industrial Services Business      
Goodwill [Line Items]      
Goodwill 313,400,000 313,400,000  
Other intangible assets $ 51,900,000 $ 51,900,000