Business Segment Information - Total Assets By Reportable Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total assets	$ 2,213,653	$ 2,326,028
Corporate, Eliminations and Other
Segment Reporting Information [Line Items]
Total assets	180,233	98,561
Well Intervention | Reportable Segments
Segment Reporting Information [Line Items]
Total assets	1,830,655	2,012,214
Robotics | Reportable Segments
Segment Reporting Information [Line Items]
Total assets	88,781	96,249
Production Facilities | Reportable Segments
Segment Reporting Information [Line Items]
Total assets	$ 113,984	$ 119,004