Revenue from Contracts with Customers - Disaggregation Of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue From Contracts With Customers
Total Revenue	$ 376,960	$ 342,419	$ 957,312	$ 1,003,427
Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(8,807)	(9,010)	(24,583)	(35,867)
Well Intervention
Revenue From Contracts With Customers
Total Revenue	193,205	174,613	548,365	597,581
Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	193,205	174,613	548,365	603,674
Well Intervention \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue				6,093
Well Intervention \| Material reconciling
Revenue From Contracts With Customers
Total Revenue		8,100		20,100
Robotics
Revenue From Contracts With Customers
Total Revenue	90,600	75,554	211,502	186,536
Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	99,407	84,526	236,021	216,084
Robotics \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	8,807	8,972	24,519	29,548
Shallow Water Abandonment
Revenue From Contracts With Customers
Total Revenue	74,642	71,557	142,014	149,063
Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	74,642	71,595	142,078	149,289
Shallow Water Abandonment \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue		38	64	226
Production Facilities
Revenue From Contracts With Customers
Total Revenue	18,513	20,695	55,431	70,247
Production Facilities \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	18,513	20,695	55,431	70,247
Production maximization
Revenue From Contracts With Customers
Total Revenue	116,257	141,776	328,889	397,151
Production maximization \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(3,804)	(6,266)	(8,478)	(23,704)
Production maximization \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	65,350	92,323	189,112	270,301
Production maximization \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	33,591	34,541	87,871	73,573
Production maximization \| Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	2,607	483	4,953	6,734
Production maximization \| Production Facilities \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	18,513	20,695	55,431	70,247
Decommissioning
Revenue From Contracts With Customers
Total Revenue	205,096	153,249	500,147	478,959
Decommissioning \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(4,374)	(2,744)	(15,031)	(11,812)
Decommissioning \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	124,364	82,135	353,809	332,959
Decommissioning \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	13,071	2,746	24,320	15,257
Decommissioning \| Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	72,035	71,112	137,049	142,555
Renewables
Revenue From Contracts With Customers
Total Revenue	50,104	42,804	108,941	117,469
Renewables \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	50,104	42,804	108,865	117,469
Renewables \| Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue			76
Other
Revenue From Contracts With Customers
Total Revenue	5,503	4,590	19,335	9,848
Other \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(629)		(1,074)	(351)
Other \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	3,491	155	5,444	414
Other \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	2,641	4,435	14,965	9,785
Short-term
Revenue From Contracts With Customers
Total Revenue	233,020	232,428	452,763	650,662
Short-term \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue		(38)	(60)	(6,471)
Short-term \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	80,075	130,150	150,428	417,716
Short-term \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	82,168	48,906	169,497	118,275
Short-term \| Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	70,777	53,410	132,898	121,142
Long-term
Revenue From Contracts With Customers
Total Revenue	143,940	109,991	504,549	352,765
Long-term \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(8,807)	(8,972)	(24,523)	(29,396)
Long-term \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	113,130	44,463	397,937	185,958
Long-term \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	17,239	35,620	66,524	97,809
Long-term \| Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	3,865	18,185	9,180	28,147
Long-term \| Production Facilities \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	$ 18,513	$ 20,695	$ 55,431	$ 70,247