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Accounts Receivable, Net - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020 | Jun. 30, 2019
Accounts Notes And Loans Receivable [Line Items] |  |  |
Estimated credit loss expense includes specific provision |  | $ 10,723 | $ 2,736
Sales Revenue |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Concentration risk percentage | 10.00% | 10.00% |
Sales Revenue | Minimum | Customer Concentration Risk |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Concentration risk percentage |  | 10.00% |
Accounts Receivable | Customer Concentration Risk | City of New York Department of Transportation |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Concentration risk percentage |  | 42.20% |
Accounts Receivable | Minimum | Customer Concentration Risk |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Concentration risk percentage |  | 10.00% |
One Customer of Commercial Services (All Other) |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Estimated credit loss expense includes specific provision |  | $ 3,500 |

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