| **Business and Summary of Significant Accounting Principles (Tables)**              | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
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| **Accounting Policies [Abstract]**                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Schedule of Recognized Identified Assets Acquired and Liabilities Assumed           | Purchase price: Previously ReportedAdjustmentsFinal Purchase Price AllocationCash consideration paid $100,000—100,000Fair value of the one-third ownership interest of AWN 267,642(2,131)265,511Total purchase price $367,642(2,131)365,511     Assets acquired and liabilities assumed:    Acquired assets    Current assets $16,9521116,963Property and equipment, including construction in progress 82,47313882,611Goodwill 140,0818,867148,948Wireless licenses 65,433(5,053)60,380Rights to use capacity 52,636(7,298)45,338Other assets 16,0781,20417,282Fair value of liabilities assumed (6,011)—(6,011)Total fair value of assets acquired and liabilities assumed $367,642(2,131)365,511                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Pro Forma Information                                                               | The following unaudited pro forma financial information is presented as if the acquisition occurred on January 1, 2012 (amounts in thousands): (unaudited) Years Ended  December 31, 2013 2012Pro forma consolidated revenue$897,270 848,676                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Schedule of Calculation of Numerator and Denominator in Earnings Per Share          | Earnings per common share (“EPS”) and common shares used to calculate basic and diluted EPS consist of the following (amounts in thousands, except per share amounts): Year Ended December 31, 2014 Class A Class BBasic net income per share:   Numerator:   Allocation of undistributed earnings$6,980 577    Denominator:   Weighted average common shares outstanding38,219 3,162Basic net income attributable to GCI common stockholders per common share$0.18 0.18    Diluted net income per share:   Numerator:   Allocation of undistributed earnings for basic computation$6,980 577Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares577 —Effect of share based compensation that may be settled in cash or shares— (2)Net income adjusted for allocation of undistributed earnings$7,557 575    Denominator:   Number of shares used in basic computation38,219 3,162Conversion of Class B to Class A common shares outstanding3,162 —Unexercised stock options112 —Number of shares used in per share computation41,493 3,162Diluted net income attributable to GCI common stockholders per common share$0.18 0.18 Years Ended December 31, 2013 2012 Class A Class B Class A Class BBasic net income per share:       Numerator:       Allocation of undistributed earnings$8,678 728 8,938 735        Denominator:       Weighted average common shares outstanding37,732 3,166 38,560 3,170Basic net income attributable to GCI common stockholders per common share$0.23 0.23 0.23 0.23        Diluted net income per share:       Numerator:       Allocation of undistributed earnings for basic computation$8,678 728 8,938 735Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares728 — 735 —Reallocation of undistributed earnings as a result of conversion of dilutive securities— (3) — (8)Effect of share based compensation that may be settled in cash or shares— — (13) —Net income adjusted for allocation of undistributed earnings and effect of share based compensation that may be settled in cash or shares$9,406 725 9,660 727        Denominator:       Number of shares used in basic computation37,732 3,166 38,560 3,170Conversion of Class B to Class A common shares outstanding3,166 — 3,170 —Unexercised stock options142 — 158 —Effect of share based compensation that may be settled in cash or shares— — 231 —Number of shares used in per share computation41,040 3,166 42,119 3,170Diluted net income attributable to GCI common stockholders per common share$0.23 0.23 0.23 0.23 |
| Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | Weighted average shares associated with outstanding share awards for the years ended December 31, 2014, 2013 and 2012 which have been excluded from the computations of diluted EPS, because the effect of including these share awards would have been anti-dilutive, consist of the following (shares, in thousands): Years Ended December 31, 2014 2013 2012Shares associated with anti-dilutive unexercised stock options29 86 88Share-based compensation that may be settled in cash or shares, the effect of which is anti-dilutive26 90 —                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| Schedule of Contingent Awards                                                       | Shares associated with contingent awards for the years ended December 31, 2014, 2013 and 2012, which have been excluded from the computations of diluted EPS because the contingencies of these awards have not been met at December 31, 2014, 2013 and 2012, consist of the following (shares in thousands): Years Ended December 31, 2014 2013 2012Shares associated with contingent awards— — 58                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| Schedule of Stock by Class                                                          | Following are the changes in issued common stock for the years ended December 31, 2014, 2013 and 2012 (shares, in thousands): Class A Class BBalances at January 1, 201239,296 3,171Class B shares converted to Class A2 (2)Shares issued upon stock option exercises320 —Share awards issued731 —Shares repurchased and retired(1,469) —Shares acquired to settle minimum statutory tax withholding requirements and subsequently retired(337) —Other(9) —Balances at December 31, 201238,534 3,169Class B shares converted to Class A4 (4)Shares issued upon stock option exercises87 —Share awards issued680 —Shares repurchased and retired(1,822) —Shares acquired to settle minimum statutory tax withholding requirements and subsequently retired(147) —Other(37) —Balances at December 31, 201337,299 3,165Class B shares converted to Class A6 (6)Shares issued upon stock option exercises51 —Share awards issued1,267 —Shares repurchased and retired(429) —Shares acquired to settle minimum statutory tax withholding requirements and subsequently retired(196) —Balances at December 31, 201437,998 3,159                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Property Plant and Equipment Useful Life                                            | Depreciation is computed using the straight-line method based upon the shorter of the estimated useful lives of the assets or the lease term, if applicable, in the following ranges:Asset CategoryAsset LivesTelephony transmission equipment and distribution facilities5-20 yearsFiber optic cable systems15-25 yearsCable transmission equipment and distribution facilities5-30 yearsSupport equipment and systems3-20 yearsTransportation equipment5-13 yearsProperty and equipment under capital leases12-20 yearsBuildings25 yearsCustomer premise equipment2-20 yearsStudio equipment10-15 years                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| Schedule of Asset Retirement Obligations                                            | Following is a reconciliation of thebeginning and ending aggregate carrying amounts of our liability for asset retirement obligations (amounts in thousands):Balance at December 31, 2012$16,280Liability incurred5,292Additions upon the close of AWN5,218Accretion expense77Liability settled(65)Balance at December 31, 201326,802Liability incurred4,268Accretion expense1,249Revision in estimate(355)Liability settled(24)Balance at December 31 2014$31,940                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Excise and Sales Taxes                                                              | The following are certain surcharges reported on a gross basis in our Consolidated Income Statements (amounts in thousands): Years Ended December 31, 2014 2013 2012Surcharges reported gross$4,252 4,644 5,401                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |

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| - Definition
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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Tabular disclosure of the surcharges assessed by a governmental authority that are directly imposed on a revenue-producing transaction between us and a customer.
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| - Definition
Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.
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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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Tabular disclosure of the carrying amount of a liability for asset retirement obligations.
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| - Definition
Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.
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| - Definition
Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree.
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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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