v3.26.1
Description of the business: (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 38 Months Ended
May 01, 2023
USD ($)
installment
Jun. 30, 2026
USD ($)
country
Apr. 30, 2024
USD ($)
Jun. 30, 2026
USD ($)
country
Jun. 30, 2025
USD ($)
Mar. 31, 2024
USD ($)
Sep. 30, 2023
USD ($)
Jun. 30, 2026
USD ($)
country
MB
GB
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
country
Dec. 31, 2025
USD ($)
Description of the business and summary of significant accounting policies:                      
Number of countries entity operates | country   58   58       58   58  
Estimated payment related to acquired short-term lease obligations $ 157,200,000                    
Discount of payment related to purchase agreement   $ 25,034,000   $ 25,034,000       $ 25,034,000   $ 25,034,000 $ 24,109,000
Estimated Purchase Agreement payment to be received, amount of discount   3,081,000   3,081,000       3,081,000   3,081,000 $ 4,006,000
Optical fiber and rights of way                      
Description of the business and summary of significant accounting policies:                      
Total property and equipment 369,200,000                    
IP Transit Services Agreement | T-Mobile USA, Inc.,                      
Description of the business and summary of significant accounting policies:                      
Amount payable 700,000,000                    
Consideration paid   8,300,000   33,300,000 $ 25,000,000     58,300,000 $ 50,000,000    
Amounts due from Seller - IP Transit Services Agreement, amount of discount 79,600,000                    
Amortization of discount resulted in interest income       2,700,000 4,300,000            
IP Transit Services Agreement | Equal monthly installments during the first year after the Closing | T-Mobile USA, Inc.,                      
Description of the business and summary of significant accounting policies:                      
Amount payable 350,000,000                    
IP Transit Services Agreement | Equal monthly installments over the subsequent 42 months | T-Mobile USA, Inc.,                      
Description of the business and summary of significant accounting policies:                      
Amount payable 350,000,000                    
IP Transit Services Agreement | Per Month During First Year After Closing Date | T-Mobile USA, Inc.,                      
Description of the business and summary of significant accounting policies:                      
Amount payable 29,200,000                    
IP Transit Services Agreement | Per Month Over Subsequent Forty Two Months | T-Mobile USA, Inc.,                      
Description of the business and summary of significant accounting policies:                      
Amount payable 8,300,000                    
IP Transit Services Agreement | T-Mobile affiliate                      
Description of the business and summary of significant accounting policies:                      
Amount payable 700,000,000                    
Amortization of discount resulted in interest income               5,800,000 9,000,000    
Wireline Network Holdings LLC                      
Description of the business and summary of significant accounting policies:                      
Total property and equipment 965,700,000                    
Intangible asset acquired 458,000,000                    
Impairment recorded                   0  
Wireline Network Holdings LLC | Buyer                      
Description of the business and summary of significant accounting policies:                      
Short term lease payment     $ 5,000,000                
Wireline Network Holdings LLC | Purchase Agreement                      
Description of the business and summary of significant accounting policies:                      
Amount payable 1,000                    
Wireline Network Holdings LLC | Purchase Agreement | Buyer                      
Description of the business and summary of significant accounting policies:                      
Cash and cash equivalents 43,400,000                    
Working capital adjustment 61,100,000                    
Additional working capital adjustment             $ 5,000,000        
Short term lease payment           $ 7,200,000          
Estimated payment related to acquired short-term lease obligations 28,100,000                    
Discount of payment related to purchase agreement $ 19,800,000                    
Estimated payment related to acquired short-term lease obligations, number of equal payments | installment 4                    
Estimated Purchase Agreement payment to be received, amount of discount $ 8,400,000                    
Reduction in short term lease payment           $ 17,000,000 $ 4,800,000        
Amortization of income       500,000 400,000     900,000 900,000    
Wireline Network Holdings LLC | Customer relationships                      
Description of the business and summary of significant accounting policies:                      
Intangible assets $ 16,000,000                    
Acquired customer relationships, estimated useful life (in years) 9 years                    
Amortization of intangible assets       400,000 $ 400,000     900,000 $ 900,000    
Acquired customer relationships, future amortization expense per year   $ 1,800,000   $ 1,800,000       $ 1,800,000   $ 1,800,000  
Acquired customer relationships, future amortization expense, amortization period (in years)               6 years      
Minimum                      
Description of the business and summary of significant accounting policies:                      
On-net service speed range | MB               100      
Minimum | Wireline Network Holdings LLC | Purchase Agreement | Buyer                      
Description of the business and summary of significant accounting policies:                      
Estimated payment related to acquired short-term lease obligations, payment period after closing date 55 months                    
Maximum                      
Description of the business and summary of significant accounting policies:                      
On-net service speed range | GB               400      
Maximum | Wireline Network Holdings LLC | Purchase Agreement | Buyer                      
Description of the business and summary of significant accounting policies:                      
Estimated payment related to acquired short-term lease obligations, payment period after closing date 58 months