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Asset Impairments and Other Restructuring Items - Narrative (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2020 | Sep. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2021 USD ($) reporting_unit | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage decline in crude oil prices | 50.00% |  |  |  |  |  |  |  |  |
Reduction of payroll tax expense |  | $ 1,200 |  |  |  |  | $ 8,800 |  |  |
Number of reporting units with goodwill balances | reporting_unit |  |  |  |  |  |  | 3 |  |  |
Goodwill, net |  | 76,372 |  |  |  |  | $ 76,372 |  | $ 76,489 | $ 482,300
Impairments of goodwill |  | 0 |  | $ 0 |  | $ 406,056 | 0 | $ 406,056 |  |
Fixed assets |  | 0 | $ 650 | $ 0 | $ 2,992 | 5,198 | 3,444 | 8,190 |  |
Offshore/Manufactured Products |  |  |  |  |  |  |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill, net |  | 76,500 |  |  |  |  | 76,500 |  | $ 76,500 |
Impairments of goodwill |  |  |  |  |  |  |  | 86,500 |  |
Well Site Services |  |  |  |  |  |  |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |  |  |  |  |  |  |
Impairments of goodwill |  |  |  |  |  |  |  | 127,100 |  |
Fixed assets |  |  |  |  |  |  | 3,400 |  |  |
Operating lease, liability |  | $ 1,900 |  |  |  |  | $ 1,900 |  |  |
Well Site Services | Well Site Services Drilling Services |  |  |  |  |  |  |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |  |  |  |  |  |  |
Fixed assets |  |  |  |  |  | $ 5,200 |  | $ 8,200 |  |

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