Revenue from Contracts with Customers - Schedule of Net Contract Liabilities on Uncompleted Construction Projects (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Costs incurred on uncompleted construction contracts	$ 8,656,642	$ 8,258,802
Estimated earnings, thereon	1,172,224	1,081,509
Costs and estimated earnings on uncompleted construction contracts	9,828,866	9,340,311
Less: billings to date	10,188,023	9,741,846
Net billings in excess of costs	$ (359,157)	$ (401,535)