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Net Property and Equipment in Service (Tables)
12 Months Ended
Dec. 31, 2012
Net Property and Equipment in Service [Abstract]  
Property, Plant and Equipment [Table Text Block]
   2012 2011
 Land and buildings$ 56,507  47,133
 Telephony transmission equipment and distribution facilities  798,932  752,083
 Cable transmission equipment and distribution facilities  155,122  141,400
 Support equipment and systems  216,495  202,785
 Transportation equipment  9,184  8,269
 Property and equipment under capital leases  104,251  102,972
 Customer premise equipment  142,176  134,207
 Fiber optic cable systems  291,220  283,997
    1,773,887  1,672,846
 Less accumulated depreciation  901,398  798,794
 Less accumulated amortization  34,242  24,931
 Net property and equipment in service$ 838,247  849,121