Property, Plant and Equipment [Table Text Block] |
Property and equipment consisted of the following: | | | | | | | | | | | Useful life | | As of March 31, 2016 | | As of December 31, 2015 | Non-communications: | | | | | | Computer equipment and software | 1-5 years | | $ | 92,035 |
| | 89,093 |
| Office furniture and equipment | 3-7 years | | 12,415 |
| | 12,638 |
| Building and building improvements | 5-39 years | | 12,239 |
| | 12,239 |
| Transportation equipment | 4-10 years | | 3,868 |
| | 3,868 |
| Leasehold improvements | 5-20 years | | 3,332 |
| | 3,545 |
| Land | — | | 700 |
| | 700 |
| Construction in progress | — | | 9,877 |
| | 1,210 |
| | | | 134,466 |
| | 123,293 |
| Accumulated depreciation - non-communications | | | 80,335 |
| | 77,188 |
| Non-communications, net property and equipment | | | 54,131 |
| | 46,105 |
| | | | | | | Communications: | | | | | | Network plant and fiber | 5-15 years | | 24,868 |
| | 25,669 |
| Customer located property | 5-10 years | | 3,776 |
| | 6,912 |
| Central office | 5-15 years | | 3,207 |
| | 909 |
| Other | 1-20 years | | 1,754 |
| | 887 |
| Construction in progress | — | | 1,752 |
| | — |
| | | | 35,357 |
| | 34,377 |
| Accumulated depreciation - communications | | | 780 |
| | — |
| Communications, net property and equipment | | | 34,577 |
| | 34,377 |
| Total property and equipment, net | | | $ | 88,708 |
| | 80,482 |
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