Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Legal Proceedings (Details)

v3.21.2
Commitments and Contingencies - Legal Proceedings (Details)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 24 Months Ended 52 Months Ended
Jul. 31, 2021
USD ($)
Aug. 31, 2020
USD ($)
Jul. 31, 2019
USD ($)
Apr. 30, 2019
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2020
USD ($)
Apr. 30, 2019
USD ($)
Nov. 30, 2021
USD ($)
Aug. 31, 2019
building
Loss Contingencies [Line Items]                              
Gross Profit         $ (534,676) $ (507,514)     $ (1,355,277) $ (1,194,974)          
Number of buildings with property damage | building                             2
Lorenzo Benton v Telecom Network Specialists Inc                              
Loss Contingencies [Line Items]                              
Damages sought $ 37,000                            
Damages awarded                       $ 9,500      
Reasonably possible estimate of loss         9,500       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       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       $ 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   $ 38,000   $ 45,000                      
Bond proceeds received       $ 112,000                      
Maurepas | Maurepas Project Dispute                              
Loss Contingencies [Line Items]                              
Damages sought     $ 59,000