Contract Assets and Liabilities - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) project	Mar. 31, 2019 USD ($) project	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Percentage completed of certain milestones			10.00%
Six Construction Projects
Property, Plant and Equipment [Line Items]
Number of Projects | project	6
Gross profit write down | $	$ 3.2
Four Construction Projects
Property, Plant and Equipment [Line Items]
Number of Projects | project	4
Gross profit write down | $	$ 2.5
Two Construction Projects
Property, Plant and Equipment [Line Items]
Number of Projects | project	2	2
Gross profit write up | $	$ 1.0	$ 1.6
One Construction Project
Property, Plant and Equipment [Line Items]
Number of Projects | project		1
Gross profit write up | $		$ 1.2
Three Construction Projects
Property, Plant and Equipment [Line Items]
Number of Projects | project		3
Gross profit write down | $		$ 1.2