Annual report pursuant to Section 13 and 15(d)

Net Property and Equipment (PPE by Class) (Details)

v3.8.0.1
Net Property and Equipment (PPE by Class) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property and equipment $ 2,754,667 $ 2,614,875
Less accumulated depreciation 1,541,264 1,385,620
Less accumulated amortization on property and equipment under capital leases 58,692 67,337
Net property and equipment 1,154,711 1,161,918
Gross property and equipment under capital leases 112,495 112,495
Land and buildings    
Property, Plant and Equipment [Line Items]    
Property and equipment 119,553 114,966
Telephony transmission equipment and distribution facilities    
Property, Plant and Equipment [Line Items]    
Property and equipment 1,402,610 1,271,425
Cable transmission equipment and distribution facilities    
Property, Plant and Equipment [Line Items]    
Property and equipment 285,665 231,539
Studio equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment 14,825 15,456
Support equipment and systems    
Property, Plant and Equipment [Line Items]    
Property and equipment 299,511 290,209
Transportation equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment 23,468 23,674
Customer premise equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment 152,731 158,513
Fiber optic cable systems    
Property, Plant and Equipment [Line Items]    
Property and equipment 353,291 351,460
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property and equipment $ 103,013 $ 157,633