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Commitments and Contingencies - Legal Proceedings (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended 52 Months Ended
Aug. 31, 2020
Jul. 31, 2020
Jul. 31, 2019
Apr. 30, 2019
Jun. 30, 2019
Sep. 30, 2017
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2015
Apr. 30, 2019
Nov. 30, 2021
Loss Contingencies [Line Items]                        
Gross profit (loss)             $ (1,660,847) $ (1,600,252) $ (1,479,964)      
Termination of the Peru Telecommunications Project                        
Loss Contingencies [Line Items]                        
Recorded charges         $ 79,200              
Net receivable position on projects             120,000          
Scenario, Adjustment | Correction Of Estimated Project Costs And Percentage Of Completion Method [Member] | Termination of the Peru Telecommunications Project                        
Loss Contingencies [Line Items]                        
Gross profit (loss)         $ 14,500              
Lorenzo Benton v Telecom Network Specialists Inc | Maximum                        
Loss Contingencies [Line Items]                        
Reasonably possible amount of loss             9,500          
Damages awarded   $ 9,500                    
Redes | Termination of the Peru Telecommunications Project                        
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 | Forecast | Termination of the Peru Telecommunications Project                        
Loss Contingencies [Line Items]                        
Payment Of Arbitration                       $ 190,000
Redes | Telecommunication Networks Construction and Operation                        
Loss Contingencies [Line Items]                        
Term of post-construction operation and maintenance period                   10 years    
Redes | Telecommunication Networks Construction and Operation | Termination of the Peru Telecommunications Project                        
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 | Maurepas Project Dispute                        
Loss Contingencies [Line Items]                        
Damages sought           $ 22,000            
Maurepas | Maurepas Project Dispute                        
Loss Contingencies [Line Items]                        
Damages sought     $ 59,000                  
PRONATEL | Termination of the Peru Telecommunications Project                        
Loss Contingencies [Line Items]                        
Damages sought $ 44,000     $ 45,000                
Amount collected through exercise of advance payment bonds             $ 87,000