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v3.21.1

Acquisitions - Contingent Earn-out Obligation (Details) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Apr. 01, 2020 USD ($) Milestone | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |
Revenues |  | $ 669,761 | $ 700,131
TAS Energy |  |  |
Business Acquisition [Line Items] |  |  |
Contingent consideration earn-out milestones achieved | Milestone | 2 |  |
Contingent earn-out period | 27 months |  |
Contingent earn-out estimated milestone payment, minimum | $ 1,000 |  |
Contingent earn-out estimated milestone payment, maximum | $ 8,000 |  |
Cash flow discount rate | 17.70% |  |
TAS Energy | Federal |  |  |
Business Acquisition [Line Items] |  |  |
Net operating loss carryforwards | $ 53,200 |  |
TAS Energy | State |  |  |
Business Acquisition [Line Items] |  |  |
Net operating loss carryforwards | $ 6,500 |  |
TAS Energy | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Cash flow discount rate | 15.00% |  |
TAS Energy | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Cash flow discount rate | 23.50% |  |

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