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v3.21.2

Related Party Transactions - Executive Officers - Narrative (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 USD ($) employee | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) employee | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Earn-Out Liabilities |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Acquisition-related contingent consideration liabilities, payments | $ 800,000 | $ 0 | $ 47,000,000 | $ 50,400,000 |
Management | Subcontracting Arrangements |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Number of management members, subcontracting arrangement | employee | 2 |  | 2 |  |
Expenses, related party | $ 41,100,000 | 0 | $ 86,900,000 | 600,000 |
Payables, related party | 7,100,000 |  | 7,100,000 |  | $ 1,400,000
Chairman, Board of Directors | Lease Agreements |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Expenses, related party | 600,000 | 600,000 | 1,900,000 | 1,900,000 |
Executive Officers | Related Customer |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Receivables, related party | 800,000 |  | 800,000 |  | 900,000
Charges, related party | 300,000 | 300,000 | 900,000 | 1,000,000 |
Executive Officers | Construction Services |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Expenses, related party |  |  | 300,000 | 200,000 |
Payables, related party | 0 |  | $ 0 |  | $ 0
Revenue, related party |  | $ 700,000 |  | $ 6,200,000 |
Immediate Family Member of Management | Construction Management Firm Specializing in Steel Building Systems | Earn-Out Liabilities |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Acquisition-related contingent consideration liabilities, payments | $ 800,000 |  |  |  |

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