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ACQUISITIONS (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended |
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Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | May 31, 2011 BDC | Dec. 31, 2013 BDC | May 02, 2011 M3 Wireless, Ltd. | Dec. 31, 2013 M3 Wireless, Ltd. Customer relationships | May 02, 2011 M3 Wireless, Ltd. Customer relationships
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest before merger (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 58.00% |  |  |  |
Ownership interest after merger (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 42.00% | 42.00% |  |  |
Total consideration |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,655 |  |
Purchase price allocation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net working capital |  |  |  |  |  |  |  |  |  |  |  |  |  | 675 |  |
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,577 |  |
Intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,600
Telecommunications licenses |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,100 |  |
Goodwill | 45,077 |  |  |  | 45,077 |  |  |  | 45,077 | 45,077 | 45,077 |  |  | 3,105 |  |
Note payable- affiliate |  |  |  |  |  |  |  |  |  |  |  |  |  | (7,012) |  |
Other long term liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | (200) |  |
Non-controlling interests |  |  |  |  |  |  |  |  |  |  |  |  |  | (9,190) |  |
Net assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,655 |  |
Assets acquired, related information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated life |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 years |
As Reported |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | 77,028 | 79,350 | 71,625 | 64,832 | 69,912 | 73,312 | 68,827 | 65,745 | 292,835 | 277,796 | 262,807 |  |  |  |  |
Net income attributable to ATN stockholders | 17,857 | 276,224 | 8,859 | 8,776 | 13,116 | 15,966 | 10,529 | 9,321 | 311,716 | 48,932 | 21,794 |  |  |  |  |
Earnings per basic shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing Operations (in dollars per share) | $ 1.02 | $ 0.10 | $ 0.41 | $ 0.31 | $ 0.48 | $ 0.48 | $ 0.19 | $ 0.19 | $ 1.84 | $ 1.34 | $ 0.47 |  |  |  |  |
Discontinued Operations (in dollars per share) | $ 0.15 | $ 17.45 | $ 0.16 | $ 0.25 | $ 0.36 | $ 0.55 | $ 0.49 | $ 0.42 | $ 18.01 | $ 1.81 | $ 0.95 |  |  |  |  |
Total (in dollars per share) | $ 1.17 | $ 17.55 | $ 0.57 | $ 0.56 | $ 0.84 | $ 1.03 | $ 0.68 | $ 0.61 | $ 19.85 | $ 3.15 | $ 1.42 |  |  |  |  |
Earnings per diluted shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing Operations (in dollars per share) | $ 1.02 | $ 0.10 | $ 0.40 | $ 0.31 | $ 0.48 | $ 0.47 | $ 0.19 | $ 0.19 | $ 1.83 | $ 1.33 | $ 0.47 |  |  |  |  |
Discontinued Operations (in dollars per share) | $ 0.14 | $ 17.33 | $ 0.16 | $ 0.25 | $ 0.36 | $ 0.55 | $ 0.48 | $ 0.41 | $ 17.88 | $ 1.80 | $ 0.94 |  |  |  |  |
Total (in dollars per share) | $ 1.16 | $ 17.43 | $ 0.56 | $ 0.56 | $ 0.84 | $ 1.02 | $ 0.67 | $ 0.60 | $ 19.71 | $ 3.13 | $ 1.41 |  |  |  |  |
Shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in shares) |  |  |  |  |  |  |  |  | 15,704 | 15,531 | 15,396 |  |  |  |  |
Diluted (in shares) |  |  |  |  |  |  |  |  | 15,817 | 15,619 | 15,495 |  |  |  |  |
Pro Forma (unaudited) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 268,895 |  |  |  |  |
Net income attributable to ATN stockholders |  |  |  |  |  |  |  |  |  |  | $ 22,329 |  |  |  |  |
Earnings per basic shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing Operations (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 0.50 |  |  |  |  |
Discontinued Operations (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 0.95 |  |  |  |  |
Total (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 1.45 |  |  |  |  |
Earnings per diluted shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing Operations (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 0.50 |  |  |  |  |
Discontinued Operations (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 0.94 |  |  |  |  |
Total (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 1.44 |  |  |  |  |
Shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in shares) |  |  |  |  |  |  |  |  |  |  | 15,396 |  |  |  |  |
Diluted (in shares) |  |  |  |  |  |  |  |  |  |  | 15,495 |  |  |  |  |

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