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Business Segment Information - Summary Of Financial Data By Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 159,897 | $ 193,490 | $ 199,147 | $ 181,021 | $ 170,749 | $ 212,609 | $ 201,728 | $ 166,823 | $ 733,555 | $ 751,909 | $ 739,818
Income (loss) from operations |  |  |  |  |  |  |  |  | 13,025 | 67,997 | 51,543
Goodwill impairment |  |  |  |  |  |  |  |  | (6,689) | 0 | 0
Net interest expense |  |  |  |  |  |  |  |  | (28,531) | (8,333) | (13,751)
Other non-operating income (expense), net |  |  |  |  |  |  |  |  | 16,889 | 5,892 | (6,794)
Income before income taxes |  |  |  |  |  |  |  |  | 1,383 | 65,556 | 30,998
Capital expenditures |  |  |  |  |  |  |  |  | 20,244 | 140,854 | 137,083
Depreciation and amortization |  |  |  |  |  |  |  |  | 133,709 | 112,720 | 110,522
Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (loss) from operations |  |  |  |  |  |  |  |  | 56,585 | 113,985 | 100,852
Intercompany Eliminations |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | (42,015) | (74,273) | (44,139)
Corporate, Eliminations and Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (loss) from operations |  |  |  |  |  |  |  |  | (36,871) | (45,988) | (49,309)
Capital expenditures |  |  |  |  |  |  |  |  | 464 | 1,102 | 443
Depreciation and amortization |  |  |  |  |  |  |  |  | 349 | 450 | 334
Well Intervention |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 539,249 | 593,300 | 560,568
Goodwill impairment |  |  |  |  |  |  |  |  | (6,689) |  |
Well Intervention | Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 539,249 | 593,300 | 560,568
Income (loss) from operations |  |  |  |  |  |  |  |  | 26,855 | 89,564 | 87,643
Capital expenditures |  |  |  |  |  |  |  |  | 19,523 | 139,212 | 136,164
Depreciation and amortization |  |  |  |  |  |  |  |  | 101,756 | 80,153 | 76,943
Well Intervention | Intercompany Eliminations |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | (15,039) | (43,484) | (14,218)
Robotics |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 178,018 | 171,672 | 158,989
Robotics | Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 178,018 | 171,672 | 158,989
Income (loss) from operations |  |  |  |  |  |  |  |  | 13,755 | 7,261 | (14,054)
Capital expenditures |  |  |  |  |  |  |  |  | 257 | 417 | 151
Depreciation and amortization |  |  |  |  |  |  |  |  | 15,952 | 16,459 | 19,175
Robotics | Intercompany Eliminations |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | (26,976) | (30,789) | (29,921)
Production Facilities |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 58,303 | 61,210 | 64,400
Production Facilities | Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 58,303 | 61,210 | 64,400
Income (loss) from operations |  |  |  |  |  |  |  |  | 15,975 | 17,160 | 27,263
Capital expenditures |  |  |  |  |  |  |  |  | 0 | 123 | 325
Depreciation and amortization |  |  |  |  |  |  |  |  | $ 15,652 | $ 15,658 | $ 14,070

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