Construction Contracts - Summary of Net Position (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Contractors [Abstract]
Costs incurred on uncompleted construction contracts	$ 741,116	$ 695,564
Estimated earnings	26,240	24,553
Billings	(773,209)	(725,174)
Net position	(5,853)	(5,057)
Construction contract costs and estimated earnings in excess of billings, net	458	249
Billings in excess of construction contract costs and estimated earnings	$ (6,311)	$ (5,306)

Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings.

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