Annual report pursuant to Section 13 and 15(d)

Net Property and Equipment in Service (Details)

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Net Property and Equipment in Service (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 1,773,887 $ 1,672,846
Accumulated Depreciation Property Plant And Equipment 901,398 798,794
Accumulated Amortization Property Plant And Equipment 34,242 24,931
Net property and equipment in service 838,247 849,121
Land and buildings
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 56,507 47,133
Telephony transmission equipment and distribution facilities
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 798,932 752,083
Cable transmission equipment and distribution facilities
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 155,122 141,400
Support equipment and systems
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 216,495 202,785
Transportation equipment
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 9,184 8,269
Property and equipment under capital leases
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 104,251 102,972
Customer premise equipment
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 142,176 134,207
Fiber optic cable systems
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 291,220 $ 283,997