Business Segment Information - Total Assets By Reportable Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Business Segment Information
Total assets	$ 2,661,149	$ 2,556,036
Corporate and Other
Business Segment Information
Total assets	209,413	210,674
Well Intervention | Reportable Segments
Business Segment Information
Total assets	1,926,350	1,790,971
Robotics | Reportable Segments
Business Segment Information
Total assets	216,369	177,801
Shallow Water Abandonment | Reportable Segments
Business Segment Information
Total assets	201,143	256,356
Production Facilities | Reportable Segments
Business Segment Information
Total assets	$ 107,874	$ 120,234