Business Segment Information - Total Assets By Reportable Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Business Segment Information
Total assets	$ 2,613,814	$ 2,556,036
Corporate and Other
Business Segment Information
Total assets	225,903	210,674
Well Intervention | Reportable Segments
Business Segment Information
Total assets	1,891,832	1,790,971
Robotics | Reportable Segments
Business Segment Information
Total assets	204,777	177,801
Shallow Water Abandonment | Reportable Segments
Business Segment Information
Total assets	176,019	256,356
Production Facilities | Reportable Segments
Business Segment Information
Total assets	$ 115,283	$ 120,234