Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Principles (Property and Equipment) (Details)

v3.19.3.a.u2
Summary of Significant Accounting Principles (Property and Equipment) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Property and equipment   $ 1,337,122  
Property and equipment $ 1,432,842    
Less accumulated depreciation 336,691 145,321  
Less accumulated depreciation on property and equipment under finance leases 5,250 7,195  
Property and equipment, net 1,090,901    
Property and equipment, net 1,090,901 1,184,606  
Depreciation expense 204,200 153,500 $ 200
Capitalized interest costs $ 4,200 3,900  
Land and buildings      
Property, Plant and Equipment [Line Items]      
Useful lives 25 years    
Property and equipment $ 118,973 105,525  
Telephony transmission equipment and distribution facilities      
Property, Plant and Equipment [Line Items]      
Property and equipment $ 837,966 763,957  
Telephony transmission equipment and distribution facilities | Minimum      
Property, Plant and Equipment [Line Items]      
Useful lives 5 years    
Telephony transmission equipment and distribution facilities | Maximum      
Property, Plant and Equipment [Line Items]      
Useful lives 20 years    
Cable transmission equipment and distribution facilities      
Property, Plant and Equipment [Line Items]      
Property and equipment $ 120,642 100,391  
Cable transmission equipment and distribution facilities | Minimum      
Property, Plant and Equipment [Line Items]      
Useful lives 5 years    
Cable transmission equipment and distribution facilities | Maximum      
Property, Plant and Equipment [Line Items]      
Useful lives 30 years    
Support equipment and systems      
Property, Plant and Equipment [Line Items]      
Property and equipment $ 132,854 118,230  
Support equipment and systems | Minimum      
Property, Plant and Equipment [Line Items]      
Useful lives 3 years    
Support equipment and systems | Maximum      
Property, Plant and Equipment [Line Items]      
Useful lives 20 years    
Customer premise equipment      
Property, Plant and Equipment [Line Items]      
Property and equipment $ 34,202 21,351  
Customer premise equipment | Minimum      
Property, Plant and Equipment [Line Items]      
Useful lives 2 years    
Customer premise equipment | Maximum      
Property, Plant and Equipment [Line Items]      
Useful lives 20 years    
Fiber optic cable systems      
Property, Plant and Equipment [Line Items]      
Property and equipment $ 53,646 53,384  
Fiber optic cable systems | Minimum      
Property, Plant and Equipment [Line Items]      
Useful lives 15 years    
Fiber optic cable systems | Maximum      
Property, Plant and Equipment [Line Items]      
Useful lives 25 years    
Other      
Property, Plant and Equipment [Line Items]      
Property and equipment $ 21,478 19,381  
Other | Minimum      
Property, Plant and Equipment [Line Items]      
Useful lives 5 years    
Other | Maximum      
Property, Plant and Equipment [Line Items]      
Useful lives 15 years    
Property and equipment under finance leases      
Property, Plant and Equipment [Line Items]      
Property and equipment under finance leases $ 17,695    
Property and equipment under finance leases      
Property, Plant and Equipment [Line Items]      
Property and equipment under finance leases   41,084  
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property and equipment $ 95,386 $ 113,819