Revenue, Contract Assets and Liabilities and Other Contract Matters - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) Vechicle	Dec. 31, 2021 USD ($) Vechicle
Hurricane Ida
Long Term Contracts Or Programs Disclosure [Line Items]
Date of landfall	Aug. 29, 2021
Impact of Hurricane Ida, description	On August 29, 2021, Hurricane Ida made landfall near Houma, Louisiana as a high-end Category 4 hurricane, with high winds, heavy rains and storm surge causing significant damage and power outages throughout the region, including our Houma Facilities and operations. Our Houma Facilities did not experience significant flood damage; however, the high winds and heavy rain damaged multiple buildings and equipment and resulted in significant debris throughout the facility. Our insurance coverages in effect at the time of the storm generally specify coverage amounts for each of our buildings (including contents) and major equipment.
Insurance payments received	$ 13.1	$ 1.0
Gain on insurance recovery	7.5
Gain on interruptions insurance recovery	3.7
Charges associated with insurance recoveries of storm		3.2
Insurance receivables	1.1
Hurricane Ida | Minimum
Long Term Contracts Or Programs Disclosure [Line Items]
Future repair costs associated with insurance payments received for buildings	0.5
Hurricane Ida | Maximum
Long Term Contracts Or Programs Disclosure [Line Items]
Future repair costs associated with insurance payments received for buildings	1.0
Marine Docking Structures, Offshore Modules and Material Supply Projects
Long Term Contracts Or Programs Disclosure [Line Items]
Change in estimated margins		3.3
Seventy-Vehicle Ferry
Long Term Contracts Or Programs Disclosure [Line Items]
Change in estimated margins	$ 0.9	4.1
Projects, percent complete (percentage)	95.00%
Reserve for loss	$ 0.3
Forty-Vehicle Ferry
Long Term Contracts Or Programs Disclosure [Line Items]
Change in estimated margins	$ 1.1	$ 0.3
Projects, percent complete (percentage)	87.00%
Reserve for loss	$ 1.2
Number of vehicle ferry projects with rework and construction challenges. | Vechicle	2
Number of vehicle ferry projects | Vechicle		2
Remaining Forty-Vehicle Ferry | Hurricane Ida
Long Term Contracts Or Programs Disclosure [Line Items]
Total charges related to deductibles	$ 0.2	$ 0.6
Offshore Modules, Material Supply and Subsea Structures Projects
Long Term Contracts Or Programs Disclosure [Line Items]
Change in estimated margins		3.3
Shipyard
Long Term Contracts Or Programs Disclosure [Line Items]
Reduction of estimated contract price for liquidated damages, amount	1.4	1.2
Change in estimated margins	$ 2.0	$ 3.8