Revenue From Contracts With Customers - Disaggregation Of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue From Contracts With Customers
Net revenues	$ 873,100	$ 674,728	$ 733,555
Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(50,187)	(48,479)	(42,015)
Well Intervention
Revenue From Contracts With Customers
Net revenues	524,241	516,564	539,249
Well Intervention | Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(16,545)	(21,521)	(15,039)
Robotics
Revenue From Contracts With Customers
Net revenues	191,921	137,295	178,018
Robotics | Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(33,642)	(26,958)	(26,976)
Shallow Water Abandonment
Revenue From Contracts With Customers
Net revenues	124,810
Production Facilities
Revenue From Contracts With Customers
Net revenues	82,315	69,348	58,303
Short-term
Revenue From Contracts With Customers
Net revenues	617,575	397,775	324,251
Short-term | Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(635)	(627)
Short-term | Well Intervention
Revenue From Contracts With Customers
Net revenues	395,867	308,734	206,812
Short-term | Robotics
Revenue From Contracts With Customers
Net revenues	97,533	89,668	117,439
Short-term | Shallow Water Abandonment
Revenue From Contracts With Customers
Net revenues	124,810
Long-term
Revenue From Contracts With Customers
Net revenues	255,525	276,953	409,304
Long-term | Intercompany Eliminations
Revenue From Contracts With Customers
Net revenues	(49,552)	(47,852)	(42,015)
Long-term | Well Intervention
Revenue From Contracts With Customers
Net revenues	128,374	207,830	332,437
Long-term | Robotics
Revenue From Contracts With Customers
Net revenues	94,388	47,627	60,579
Long-term | Production Facilities
Revenue From Contracts With Customers
Net revenues	$ 82,315	$ 69,348	$ 58,303