| December 31, 2013 | December 31, 2012 | |||||||||||
| Other Intangible Assets | Gross Carrying Amount | Accumulated Amortization | Gross Carrying Amount | Accumulated Amortization | ||||||||
| Amortized intangible assets: | ||||||||||||
| Customer lists and relationships: | ||||||||||||
| AT&T Mobility LLC | $ | 982 | $ | 771 | $ | 6,760 | $ | 6,335 | ||||
| BellSouth Corporation | 5,825 | 5,317 | 5,825 | 4,994 | ||||||||
| AT&T Corp. | 2,482 | 2,438 | 2,490 | 2,356 | ||||||||
| Other | - | - | 351 | 350 | ||||||||
| Subtotal | 9,289 | 8,526 | 15,426 | 14,035 | ||||||||
| Other | 284 | 169 | 304 | 174 | ||||||||
| Total | $ | 9,573 | $ | 8,695 | $ | 15,730 | $ | 14,209 | ||||