Revenue From Contracts With Customers - Disaggregation Of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net revenues	$ 674,728	$ 733,555	$ 751,909
Intercompany Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	(48,479)	(42,015)	(74,273)
Well Intervention
Disaggregation of Revenue [Line Items]
Net revenues	516,564	539,249	593,300
Well Intervention | Intercompany Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	(21,521)	(15,039)	(43,484)
Robotics
Disaggregation of Revenue [Line Items]
Net revenues	137,295	178,018	171,672
Robotics | Intercompany Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	(26,958)	(26,976)	(30,789)
Production Facilities
Disaggregation of Revenue [Line Items]
Net revenues	69,348	58,303	61,210
Short-term
Disaggregation of Revenue [Line Items]
Net revenues	397,775	324,251	309,427
Short-term | Intercompany Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	(627)
Short-term | Well Intervention
Disaggregation of Revenue [Line Items]
Net revenues	308,734	206,812	214,926
Short-term | Robotics
Disaggregation of Revenue [Line Items]
Net revenues	89,668	117,439	94,501
Long-term
Disaggregation of Revenue [Line Items]
Net revenues	276,953	409,304	442,482
Long-term | Intercompany Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	(47,852)	(42,015)	(74,273)
Long-term | Well Intervention
Disaggregation of Revenue [Line Items]
Net revenues	207,830	332,437	378,374
Long-term | Robotics
Disaggregation of Revenue [Line Items]
Net revenues	47,627	60,579	77,171
Long-term | Production Facilities
Disaggregation of Revenue [Line Items]
Net revenues	$ 69,348	$ 58,303	$ 61,210