Business Segment Information - Total Assets By Reportable Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Business Segment Information
Total assets	$ 2,556,036	$ 2,389,338
Corporate, Eliminations and Other
Business Segment Information
Total assets	210,674	57,049
Well Intervention | Reportable Segments
Business Segment Information
Total assets	1,790,971	1,796,269
Robotics | Reportable Segments
Business Segment Information
Total assets	177,801	192,694
Shallow Water Abandonment | Reportable Segments
Business Segment Information
Total assets	256,356	206,944
Production Facilities | Reportable Segments
Business Segment Information
Total assets	$ 120,234	$ 136,382