Business Segment Information - Total Assets By Reportable Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Business Segment Information
Total assets	$ 2,389,338	$ 2,326,028
Corporate, Eliminations and Other
Business Segment Information
Total assets	57,049	98,561
Well Intervention | Reportable Segments
Business Segment Information
Total assets	1,796,269	2,012,214
Robotics | Reportable Segments
Business Segment Information
Total assets	192,694	96,249
Shallow Water Abandonment | Reportable Segments
Business Segment Information
Total assets	206,944
Production Facilities | Reportable Segments
Business Segment Information
Total assets	$ 136,382	$ 119,004