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Revenue from Contracts with Customers - Schedule of Net Contract Liabilities on Uncompleted Construction Projects (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Revenue from Contract with Customer [Abstract] |  |
Costs incurred on uncompleted construction contracts | $ 10,727,358 | $ 9,885,192
Estimated earnings, thereon | 1,640,250 | 1,349,338
Costs and estimated earnings on uncompleted construction contracts | 12,367,608 | 11,234,530
Less: billings to date | 12,864,404 | 11,641,082
Net contract liabilities on uncompleted construction projects | $ (496,796) | $ (406,552)

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