Business Segment Information - Intercompany Segment Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Business Segment Information
Net revenues	$ (342,419)	$ (395,670)	$ (1,003,427)	$ (954,571)
Intercompany Eliminations
Business Segment Information
Net revenues	17,064	17,084	55,998	43,834
Intercompany Eliminations | Well Intervention
Business Segment Information
Net revenues	8,054	6,832	26,224	18,174
Intercompany Eliminations | Robotics
Business Segment Information
Net revenues	8,972	$ 10,252	29,548	25,634
Intercompany Eliminations | Shallow Water Abandonment
Business Segment Information
Net revenues	$ 38		$ 226	$ 26