Revenue From Contracts With Customers - Disaggregation Of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue From Contracts With Customers
Net revenues	$ 308,817	$ 162,612	$ 558,901	$ 312,737
Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(14,888)	(11,207)	(26,750)	(23,094)
Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Net revenues	154,221	106,291	296,659	212,658
Well Intervention | Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(6,873)	(3,893)	(11,342)	(7,743)
Robotics | Reportable Segments
Revenue From Contracts With Customers
Net revenues	70,050	49,850	119,272	87,201
Robotics | Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(7,989)	(7,314)	(15,382)	(15,351)
Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Net revenues	76,306		125,687
Shallow Water Abandonment | Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(26)		(26)
Production Facilities | Reportable Segments
Revenue From Contracts With Customers
Net revenues	23,128	17,678	44,033	35,972
Short-term
Revenue From Contracts With Customers
Net revenues	187,780	111,900	350,133	223,748
Short-term | Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(26)		(26)	(635)
Short-term | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Net revenues	75,621	86,048	153,388	177,394
Short-term | Robotics | Reportable Segments
Revenue From Contracts With Customers
Net revenues	38,069	25,852	73,274	46,989
Short-term | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Net revenues	74,116		123,497
Long-term
Revenue From Contracts With Customers
Net revenues	121,037	50,712	208,768	88,989
Long-term | Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(14,862)	(11,207)	(26,724)	(22,459)
Long-term | Well Intervention | Reportable Segments
Revenue From Contracts With Customers
Net revenues	78,600	20,243	143,271	35,264
Long-term | Robotics | Reportable Segments
Revenue From Contracts With Customers
Net revenues	31,981	23,998	45,998	40,212
Long-term | Shallow Water Abandonment | Reportable Segments
Revenue From Contracts With Customers
Net revenues	2,190		2,190
Long-term | Production Facilities | Reportable Segments
Revenue From Contracts With Customers
Net revenues	$ 23,128	$ 17,678	$ 44,033	$ 35,972