Revenue From Contracts With Customers - Disaggregation Of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue From Contracts With Customers
Total Revenue	$ 364,797	$ 308,817	$ 661,008	$ 558,901
Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(17,372)	(14,888)	(38,934)	(26,750)
Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	224,679	154,221	441,138	296,659
Well Intervention \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(6,918)	(6,873)	(18,170)	(11,342)
Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	81,249	70,050	131,558	119,272
Robotics \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(10,348)	(7,989)	(20,576)	(15,382)
Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	50,841	76,306	77,694	125,687
Shallow Water Abandonment \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(106)	(26)	(188)	(26)
Production Facilities \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	25,400	23,128	49,552	44,033
Production maximization
Revenue From Contracts With Customers
Total Revenue	150,488	96,273	255,375	190,754
Production maximization \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(7,819)	(4,608)	(19,211)	(8,425)
Production maximization \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	109,302	52,882	179,751	100,149
Production maximization \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	20,596	21,309	39,032	48,028
Production maximization \| Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	3,009	3,562	6,251	6,969
Production maximization \| Production Facilities \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	25,400	23,128	49,552	44,033
Decommissioning
Revenue From Contracts With Customers
Total Revenue	160,930	175,850	325,710	320,421
Decommissioning \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(3,641)	(4,943)	(10,569)	(10,014)
Decommissioning \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	109,640	96,176	252,325	188,796
Decommissioning \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	7,099	11,873	12,511	22,921
Decommissioning \| Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	47,832	72,744	71,443	118,718
Renewables
Revenue From Contracts With Customers
Total Revenue	50,493	35,885	74,665	44,563
Renewables \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(4,269)	(3,384)	(6,773)	(4,710)
Renewables \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	4,269	3,384	6,773	4,710
Renewables \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	50,493	35,885	74,665	44,563
Other
Revenue From Contracts With Customers
Total Revenue	2,886	809	5,258	3,163
Other \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(1,643)	(1,953)	(2,381)	(3,601)
Other \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	1,468	1,779	2,289	3,004
Other \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	3,061	983	5,350	3,760
Short-term
Revenue From Contracts With Customers
Total Revenue	239,608	187,780	418,234	350,133
Short-term \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(106)	(26)	(6,433)	(26)
Short-term \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	153,152	75,621	287,566	153,388
Short-term \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	44,193	38,069	69,369	73,274
Short-term \| Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	42,369	74,116	67,732	123,497
Long-term
Revenue From Contracts With Customers
Total Revenue	125,189	121,037	242,774	208,768
Long-term \| Intercompany Eliminations
Revenue From Contracts With Customers
Total Revenue	(17,266)	(14,862)	(32,501)	(26,724)
Long-term \| Well Intervention \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	71,527	78,600	153,572	143,271
Long-term \| Robotics \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	37,056	31,981	62,189	45,998
Long-term \| Shallow Water Abandonment \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	8,472	2,190	9,962	2,190
Long-term \| Production Facilities \| Reportable Segments
Revenue From Contracts With Customers
Total Revenue	$ 25,400	$ 23,128	$ 49,552	$ 44,033