Revenue From Contracts With Customers - Disaggregation Of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenue From Contracts With Customers
Total Revenue	$ 278,064	$ 296,211
Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(8,007)	(16,403)
Well Intervention
Revenue From Contracts With Customers
Total Revenue	198,374	205,207
Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	198,374	211,300
Well Intervention | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue		6,093
Well Intervention | Material reconciling
Revenue From Contracts With Customers
Total Revenue		5,200
Robotics
Revenue From Contracts With Customers
Total Revenue	43,087	40,081
Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	51,042	50,309
Robotics | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	7,955	10,228
Shallow Water Abandonment
Revenue From Contracts With Customers
Total Revenue	16,766	26,771
Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	16,818	26,853
Shallow Water Abandonment | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	52	82
Production Facilities
Revenue From Contracts With Customers
Total Revenue	19,837	24,152
Production Facilities | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	19,837	24,152
Production maximization
Revenue From Contracts With Customers
Total Revenue	138,629	104,887
Production maximization | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(3,972)	(10,878)
Production maximization | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	96,962	69,935
Production maximization | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	24,726	18,436
Production maximization | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	1,076	3,242
Production maximization | Production Facilities | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	19,837	24,152
Decommissioning
Revenue From Contracts With Customers
Total Revenue	116,330	164,780
Decommissioning | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(4,035)	(5,521)
Decommissioning | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	100,683	141,278
Decommissioning | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	4,016	5,412
Decommissioning | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	15,666	23,611
Renewables
Revenue From Contracts With Customers
Total Revenue	16,850	24,172
Renewables | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	16,774	24,172
Renewables | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	76
Other
Revenue From Contracts With Customers
Total Revenue	6,255	2,372
Other | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue		(4)
Other | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	729	87
Other | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	5,526	2,289
Short-term
Revenue From Contracts With Customers
Total Revenue	62,292	178,626
Short-term | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(52)	(6,327)
Short-term | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	24,223	134,414
Short-term | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	22,550	25,176
Short-term | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	15,571	25,363
Long-term
Revenue From Contracts With Customers
Total Revenue	215,772	117,585
Long-term | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(7,955)	(10,076)
Long-term | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	174,151	76,886
Long-term | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	28,492	25,133
Long-term | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	1,247	1,490
Long-term | Production Facilities | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	$ 19,837	$ 24,152