Business Segment Information - Intercompany Segment Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Net revenues	$ (150,125)	$ (163,415)
Well Intervention
Segment Reporting Information [Line Items]
Net revenues	(106,367)	(133,768)
Robotics
Segment Reporting Information [Line Items]
Net revenues	(37,351)	(22,156)
Intercompany Eliminations
Segment Reporting Information [Line Items]
Net revenues	11,887	8,956
Intercompany Eliminations \| Well Intervention
Segment Reporting Information [Line Items]
Net revenues	3,850	2,587
Intercompany Eliminations \| Robotics
Segment Reporting Information [Line Items]
Net revenues	$ 8,037	$ 6,369

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details