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Commitments and Contingencies - Legal Proceedings (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended 24 Months Ended 52 Months Ended
Aug. 31, 2020
Jul. 31, 2019
Apr. 30, 2019
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2019
Sep. 30, 2017
Dec. 31, 2015
Dec. 31, 2020
Apr. 30, 2019
Nov. 30, 2021
Loss Contingencies [Line Items]                      
Gross Profit       $ (372,890) $ (332,196)            
Lorenzo Benton v Telecom Network Specialists Inc                      
Loss Contingencies [Line Items]                      
Damages awarded                 $ 9,500    
Reasonably possible estimate of loss       9,500              
Disputed Contract Termination                      
Loss Contingencies [Line Items]                      
Charge to earnings related to legal proceedings           $ 79,200          
Net receivable position on projects       120,000              
Disputed Contract Termination | Adjustment | Correction of Estimated Project Costs and Percentage of Completion Method                      
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  
Net receivable position on projects       $ 87,000              
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      
Redes | Disputed Contract Termination | Forecast                      
Loss Contingencies [Line Items]                      
Amount claimed in arbitration                     $ 190,000
QPS Engineering, LLC | Maurepas Project Dispute                      
Loss Contingencies [Line Items]                      
Damages sought             $ 22,000        
PRONATEL | Disputed Contract Termination                      
Loss Contingencies [Line Items]                      
Damages sought $ 42,000   $ 45,000                
Bond proceeds received     $ 112,000                
Maurepas | Maurepas Project Dispute                      
Loss Contingencies [Line Items]                      
Damages sought   $ 59,000