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Commitments and Contingencies - Legal Proceedings (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 52 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jul. 01, 2019 | Jul. 31, 2020 | Apr. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Sep. 30, 2017 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2015 | Apr. 30, 2019
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  | $ 355,264 | $ 319,505 |  | $ 687,460 | $ 683,486 |  |
Lorenzo Benton v Telecom Network Specialists Inc |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Reasonably possible estimate of loss |  |  |  | 8,800 |  |  | 8,800 |  |  |
Lorenzo Benton v Telecom Network Specialists Inc | Subsequent Event |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Damages awarded |  | $ 8,800 |  |  |  |  |  |  |  |
Disputed Contract Termination |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Charge to earnings related to legal proceedings |  |  |  |  | 79,200 |  |  |  |  |
Net receivable position on projects |  |  |  | $ 120,000 |  |  | $ 120,000 |  |  |
Adjustment | Correction of Estimated Project Costs and Percentage of Completion Method | Disputed Contract Termination |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  | $ (14,500) |  |  |  |  |
Redes | Telecommunication Networks Construction and Operation |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Term of post-construction operation and maintenance period |  |  |  |  |  |  |  |  | 10 years |
Redes | Disputed Contract Termination |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Advance payments received |  |  |  |  |  |  |  |  |  | $ 87,000
On-demand performance bonds |  |  |  |  |  |  |  |  | $ 25,000 |
Construction costs incurred |  |  |  |  |  |  |  |  |  | 157,000
Payments received on construction contracts |  |  |  |  |  |  |  |  |  | $ 100,000
Redes | Disputed Contract Termination | Telecommunication Networks Construction and Operation |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate consideration for projects |  |  |  |  |  |  |  |  | 248,000 |
Aggregate consideration to be paid during the construction period |  |  |  |  |  |  |  |  | 151,000 |
Aggregate consideration to be paid during the post-construction operation and maintenance period |  |  |  |  |  |  |  |  | $ 97,000 |
QPS Engineering, LLC | Maurepas Project Dispute |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Damages sought |  |  |  |  |  | $ 22,000 |  |  |  |
PRONATEL | Disputed Contract Termination |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Damages sought |  |  | $ 45,000 |  |  |  |  |  |  |
Bond proceeds received |  |  | $ 112,000 |  |  |  |  |  |  |
Maurepas | Maurepas Project Dispute |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Damages sought | $ 59,000 |  |  |  |  |  |  |  |  |

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