Revenue from Contracts with Customers - Disaggregation Of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue From Contracts With Customers
Total Revenue	$ 302,288	$ 364,797	$ 580,352	$ 661,008
Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(7,769)	(10,454)	(15,776)	(26,857)
Well Intervention
Revenue From Contracts With Customers
Total Revenue	156,786	217,761	355,160	422,968
Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	156,786	217,761	355,160	429,061
Well Intervention | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue				6,093
Well Intervention | Material reconciling
Revenue From Contracts With Customers
Total Revenue		6,900		12,100
Robotics
Revenue From Contracts With Customers
Total Revenue	77,815	70,901	120,902	110,982
Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	85,572	81,249	136,614	131,558
Robotics | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	7,757	10,348	15,712	20,576
Shallow Water Abandonment
Revenue From Contracts With Customers
Total Revenue	50,606	50,735	67,372	77,506
Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	50,618	50,841	67,436	77,694
Shallow Water Abandonment | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	12	106	64	188
Production Facilities
Revenue From Contracts With Customers
Total Revenue	17,081	25,400	36,918	49,552
Production Facilities | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	17,081	25,400	36,918	49,552
Production maximization
Revenue From Contracts With Customers
Total Revenue	74,003	150,488	212,632	255,375
Production maximization | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(702)	(6,560)	(4,674)	(17,438)
Production maximization | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	26,800	108,043	123,762	177,978
Production maximization | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	29,554	20,596	54,280	39,032
Production maximization | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	1,270	3,009	2,346	6,251
Production maximization | Production Facilities | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	17,081	25,400	36,918	49,552
Decommissioning
Revenue From Contracts With Customers
Total Revenue	178,721	160,930	295,051	325,710
Decommissioning | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(6,622)	(3,547)	(10,657)	(9,068)
Decommissioning | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	128,762	109,546	229,445	250,824
Decommissioning | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	7,233	7,099	11,249	12,511
Decommissioning | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	49,348	47,832	65,014	71,443
Renewables
Revenue From Contracts With Customers
Total Revenue	41,987	50,493	58,837	74,665
Renewables | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	41,987	50,493	58,761	74,665
Renewables | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue			76
Other
Revenue From Contracts With Customers
Total Revenue	7,577	2,886	13,832	5,258
Other | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(445)	(347)	(445)	(351)
Other | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	1,224	172	1,953	259
Other | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	6,798	3,061	12,324	5,350
Short-term
Revenue From Contracts With Customers
Total Revenue	157,451	239,608	219,743	418,234
Short-term | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(8)	(106)	(60)	(6,433)
Short-term | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	46,130	153,152	70,353	287,566
Short-term | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	64,779	44,193	87,329	69,369
Short-term | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	46,550	42,369	62,121	67,732
Long-term
Revenue From Contracts With Customers
Total Revenue	144,837	125,189	360,609	242,774
Long-term | Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(7,761)	(10,348)	(15,716)	(20,424)
Long-term | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	110,656	64,609	284,807	141,495
Long-term | Robotics | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	20,793	37,056	49,285	62,189
Long-term | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	4,068	8,472	5,315	9,962
Long-term | Production Facilities | Reportable Segments
Revenue From Contracts With Customers
Total Revenue	$ 17,081	$ 25,400	$ 36,918	$ 49,552