| **Business and Summary of Significant Accounting Principles (Tables)**                                 | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
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| **Business and Summary of Significant Accounting Policies [Abstract]**                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]          |      Year Ended     December 31, 2012     Class A Class B Basic net income per share:    Numerator:     Allocation of undistributed earnings$ 8,938  735         Denominator:     Weighted average common shares outstanding 38,560  3,170    Basic net income attributable to GCI  common stockholders per common share$ 0.23 0.23         Diluted net income per share:    Numerator:     Allocation of undistributed earnings for basic computation$ 8,938  735  Reallocation of undistributed earnings as a result of conversion of  Class B to Class A shares 735  -  Reallocation of undistributed earnings as a result of conversion of  dilutive securities -  (8)  Effect of share based compensation that may be settled in cash  or shares (13)  -   Net income adjusted for allocation of undistributed earnings $ 9,660  727         Denominator:     Number of shares used in basic computation 38,560  3,170  Conversion of Class B to Class A common shares outstanding 3,170  -  Effect of share based compensation that may be settled in cash      or shares 158  -  Unexercised stock options 231  -   Number of shares used in per share computation 42,119  3,170    Diluted net income attributable to GCI  common stockholders per common share$ 0.23 0.23     Years Ended December 31,     2011 2010     Class A Class B Class A Class B Basic net income per share:        Numerator:         Allocation of undistributed earnings $ 5,323  401 $ 8,095  515             Denominator:         Weighted average common shares  outstanding 42,175  3,175  50,076  3,183    Basic net income attributable to GCI  common stockholders per common share$ 0.13  0.13 $ 0.16  0.16             Diluted net income per share:        Numerator:         Allocation of undistributed earnings for  basic computation$ 5,323  401 $ 8,095  515  Reallocation of undistributed earnings as a  result of conversion of Class B to Class A  shares 401  -  515  -  Reallocation of undistributed earnings as a  result of conversion of dilutive securities -  (30)  -  (2)  Effect of share based compensation that  may be settled in cash or shares (367)  -  -  -   Net income adjusted for allocation of  undistributed earnings and effect of  share based compensation that may be settled  in cash or shares$ 5,357  371 $ 8,610  513             Denominator:         Number of shares used in basic computation 42,175  3,175  50,076  3,183  Conversion of Class B to Class A common  shares outstanding 3,175  -  3,183  -  Unexercised stock options 322  -  167  -  Effect of share based compensation that may  be settled in cash or shares 217  -  -  - Number of shares used in per share computation 45,889  3,175  53,426  3,183    Diluted net income attributable to GCI  common stockholders per common share$ 0.12  0.12 $ 0.16  0.16                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |   Years Ended December 31,  2012 2011 2010  Shares associated with anti-dilutive unexercised  stock options  88  38  460  Share-based compensation that may be settled  in cash or shares, the effect of which is  anti-dilutive  -  -  217                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| Schedule Of Contingent Awards [Table Text Block]                                                       |   Years Ended December 31,  2012 2011 2010  Shares associated with contingent awards  58  34  50                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Schedule of Stock by Class [Table Text Block]                                                          |    Class A Class B  Balances at January 1, 2010 51,899  3,186  Class B shares converted to Class A 8  (8)  Shares issued upon stock option exercises 116  -  Share awards issued 336  -  Shares retired (8,012)  -  Shares acquired to settle minimum statutory tax  withholding requirements (2)  -  Other (132)  -   Balances at December 31, 2010 44,213  3,178  Class B shares converted to Class A 7  (7)  Shares issued upon stock option exercises 163  -  Share awards issued 460  -  Shares retired (5,244)  -  Shares acquired to settle minimum statutory tax  withholding requirements (287)  -  Other (16)  -   Balances at December 31, 2011 39,296  3,171  Class B shares converted to Class A 2  (2)  Shares issued upon stock option exercises 320  -  Share awards issued 731  -  Shares retired (1,469)  -  Shares acquired to settle minimum statutory tax  withholding requirements (337)  -  Other (9)  -   Balances at December 31, 2012 38,534  3,169                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Property Plant And Equipment Useful Life [Table Text Block]                                            |  Asset Category Asset Lives Telephony transmission equipment and distribution facilities  5-20 years Fiber optic cable systems 15-25 years Cable transmission equipment and distribution facilities 5-30 years Support equipment and systems 3-20 years Transportation equipment 5-13 years Property and equipment under capital leases 12-20 years Buildings 25 years Customer premise equipment 2-20 years                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| Schedule of Asset Retirement Obligations [Table Text Block]                                            |   Balance at December 31, 2010$ 14,035 Liability incurred  613 Accretion expense  619 Liability settled  (44)  Balance at December 31, 2011  15,223 Liability incurred  660 Accretion expense  508 Liability settled  (111)  Balance at December 31, 2012$ 16,280                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| Excise And Sales Taxes [Table Text Block]                                                              |   Years Ended December 31,   2012 2011 2010 Surcharges reported gross$5,401 5,408 5,201                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]                          |  Consolidated Balance Sheet as of  December 31, 2011: As Previously Reported Adjustment As Revised  Property and equipment in service, net of  depreciation$ 851,705  (2,584)  849,121  Net property and equipment  894,623  (2,584)  892,039  Total assets  1,448,904  (2,584)  1,446,320  Deferred income taxes  115,296  (1,062)  114,234  Total liabilities  1,273,735  (1,062)  1,272,673  Retained earnings  99,433  (1,522)  97,911  Total GCI stockholders' equity  158,861  (1,522)  157,339  Total stockholders' equity  175,169  (1,522)  173,647  Total liabilities and stockholders' equity  1,448,904  (2,584)  1,446,320           Consolidated Income Statement for the  Year Ended December 31, 2011:        Depreciation and amortization expense  125,742  195  125,937  Operating income  90,719  (195)  90,524  Income before income tax expense  13,086  (195)  12,891  Income tax expense  7,485  (80)  7,405  Net income  5,601  (115)  5,486  Net income attributable to GCI  5,839  (115)  5,724           Consolidated Statement of Stockholders'  Equity for the Year Ended December 31, 2011:        Retained earnings, balance at January 1, 2011  93,607  (1,407)  92,200  Net income  5,601  (115)  5,486  Retained earnings, balance at December 31, 2011  99,433  (1,522)  97,911  Total stockholders' equity, balance at  January 1, 2011  200,506  (1,407)  199,099  Total stockholders' equity, balance at  December 31, 2011  175,169  (1,522)  173,647           Consolidated Statement of Cash Flows for the          Year Ended December 31, 2011:        Net income  5,601  (115)  5,486  Depreciation and amortization expense  125,742  195  125,937  Income tax expense  7,485  (80)  7,405           Consolidated Income Statement for the  Year Ended December 31, 2010:        Depreciation and amortization expense  126,114  585  126,699  Operating income  88,511  (585)  87,926  Income before income tax expense  18,443  (585)  17,858  Income tax expense  9,488  (240)  9,248  Net income  8,955  (345)  8,610  Net income attributable to GCI  8,955  (345)  8,610  Basic net income attributable to General  Communication, Inc. common stockholders  per Class A common share  0.17  (0.01)  0.16  Basic net income attributable to General  Communication, Inc. common stockholders  per Class B common share  0.17  (0.01)  0.16  Diluted net income attributable to General  Communication, Inc. common stockholders  per Class A common share  0.17  (0.01)  0.16  Diluted net income attributable to General  Communication, Inc. common stockholders  per Class B common share  0.17  (0.01)  0.16           Consolidated Statement of Stockholders'  Equity for the Year Ended December 31, 2010:        Retained earnings, balance at January 1, 2010  84,651  (1,062)  83,589  Net income  8,955  (345)  8,610  Retained earnings, balance at December 31, 2010  93,607  (1,407)  92,200  Total stockholders' equity, balance at  January 1, 2010  266,317  (1,062)  265,255  Total stockholders' equity, balance at  December 31, 2010  200,506  (1,407)  199,099           Consolidated Statement of Cash Flows for the          Year Ended December 31, 2010:        Net income  8,955  (345)  8,610  Depreciation and amortization expense  126,114  585  126,699  Income tax expense  9,488  (240)  9,248  |

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Shares associated with contingent awards which have been excluded from the computations of diluted earnings per share because the contingencies of the awards have not been met.
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| - Definition
Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.
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| - Definition
Tabular disclosure of the carrying amount of a liability for asset retirement obligations.
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| - Definition
Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends.
+ References
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| - Definition
Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made.
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| - Definition
Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information.  Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.
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