| **Business and Summary of Significant Accounting Principles (Policies)**            | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
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| **Organization, Consolidation and Presentation of Financial Statements [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Principles of Consolidation                                                         | Principles of ConsolidationOur consolidated financial statements include the consolidated accounts of GCI and its wholly owned subsidiaries, The Alaska Wireless Network, LLC ("AWN") of which we own a two-third interest and four variable interest entities (“VIEs”) for which we are the primary beneficiary after providing certain loans and guarantees.  These VIEs are Terra GCI Investment Fund, LLC (“TIF”), Terra GCI 2 Investment Fund, LLC (“TIF 2”), Terra GCI 2-USB Investment Fund, LLC (“TIF 2-USB”) and Terra GCI 3 Investment Fund, LLC (“TIF 3”).  We also include in our consolidated financial statements non-controlling interests in consolidated subsidiaries for which our ownership is less than 100 percent.  We use the equity method to account for our investments in entities that we do not control, but where we have the ability to exercise significant influence over operating and financial policies.  We use the cost method to account for our investments in entities where we hold a non-controlling interest and do not have the ability to exercise significant influence over operating and financial policies.  All significant intercompany transactions between non-regulated affiliates of our company are eliminated.  Intercompany transactions generated between regulated and non-regulated affiliates of our company are not eliminated in consolidation.                                                                                                                                                                                                                                                                         |
| Non-controlling Interests                                                           | Non-controlling InterestsNon-controlling interests represent the equity ownership interests in consolidated subsidiaries not owned by us.  Non-controlling interests are adjusted for contributions, distributions, and income and loss attributable to the non-controlling interest partners of the consolidated entities.  Income and loss is allocated to the non-controlling interests based on the respective governing documents                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| Recently Issued Accounting Pronouncements                                           | Recently Issued Accounting PronouncementsIn May 2014, the Financial Accounting Standards Board issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers, or ASU 2014-09.  This new standard provides guidance for the recognition, measurement and disclosure of revenue resulting from contracts with customers and will supersede virtually all of the current revenue recognition guidance under GAAP.  The standard is effective for the first interim period within annual reporting periods beginning after December 15, 2016.  Early adoption is not permitted.  The standard permits the use of either the retrospective or cumulative effect transition method.  We are currently evaluating the impact of the provisions of this new standard on our financial position and results of operations.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Regulatory Accounting                                                               | Regulatory AccountingWe account for our regulated operations in accordance with the accounting principles for regulated enterprises.  These accounting principles recognize the economic effects of rate regulation by recording cost and a return on investment as such amounts are recovered through rates authorized by regulatory authorities.  Accordingly, plant and equipment is depreciated over lives approved by regulators and certain costs and obligations are deferred based upon approvals received from regulators to permit recovery of such amounts in future years.  Our cost studies and depreciation rates for our regulated operations are subject to periodic audits that could result in a change to recorded revenues.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| Earnings per Common Share                                                           | Earnings per Common ShareWe compute net income attributable to GCI per share of Class A and Class B common stock using the “two class” method.  Therefore, basic net income per share is computed by dividing net income applicable to common stockholders by the weighted average number of common shares outstanding during the period.  Diluted net income per share is computed by dividing net income by the weighted average number of common and dilutive common equivalent shares outstanding during the period.  The computation of the dilutive net income per share of Class A common stock assumes the conversion of Class B common stock to Class A common stock, while the dilutive net income per share of Class B common stock does not assume the conversion of those shares. Additionally, in applying the “two-class” method, undistributed earnings are allocated to both common shares and participating securities. Our restricted stock grants are entitled to dividends and meet the criteria of a participating security.Undistributed earnings for each year are allocated based on the contractual participation rights of Class A and Class B common shares as if the earnings for the year had been distributed.  In accordance with our Articles of Incorporation, if and when dividends are declared on our common stock in accordance with Alaska corporate law, equivalent dividends shall be paid with respect to the shares of Class A and Class B common stock. Both classes of common stock have identical dividend rights and would therefore share equally in our net assets in the event of liquidation. As such, we have allocated undistributed earnings on a proportionate basis. |
| Accounts Receivable and Allowance for Doubtful Receivables                          | Accounts Receivable and Allowance for Doubtful ReceivablesTrade accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for doubtful receivables is our best estimate of the amount of probable credit losses in our existing accounts receivable. We base our estimates on the aging of our accounts receivable balances, financial health of specific customers, regional economic data, changes in our collections process, regulatory requirements and our customers’ compliance with Universal Service Administrative Company rules. We review our allowance for doubtful receivables methodology at least annually.Depending upon the type of account receivable our allowance is calculated using a pooled basis with an allowance for all accounts greater than 120 days past due or a specific identification method.  When a specific identification method is used, potentially uncollectible accounts due to bankruptcy or other issues are reviewed individually for collectability.  Account balances are charged off against the allowance when we feel it is probable the receivable will not be recovered. We do not have any off-balance-sheet credit exposure related to our customers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Revenue Recognition                                                                 | Revenue RecognitionWe recorded high cost support revenue under the Universal Service Fund (“USF”) program of $17.0 million and $10.5 million for the three months ended June 30, 2014 and 2013, respectively, and $33.5 million and $21.1 million for the six months ended June 30, 2014 and 2013, respectively.  At June 30, 2014, we have $47.4 million in high cost support accounts receivable.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| Use of Estimates                                                                    | Use of EstimatesThe preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Significant items subject to estimates and assumptions include the allowance for doubtful receivables, unbilled revenues, accrual of the USF high cost Remote area program support, share-based compensation, inventory at lower of cost or market, reserve for future customer credits, liability for incurred but not reported medical insurance claims, valuation allowances for deferred income tax assets, depreciable and amortizable lives of assets, the carrying value of long-lived assets including goodwill, cable certificates, wireless licenses,and broadcast licenses, our effective tax rate, purchase price allocations, deferred lease expense, asset retirement obligations, the accrual of cost of goods sold (exclusive of depreciation and amortization expense) (“Cost of Goods Sold”), depreciation and the accrual of contingencies and litigation.  Actual results could differ from those estimates.                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| Classification of Taxes Collected from Customers                                    | Classification of Taxes Collected from CustomersWe report sales, use, excise, and value added taxes assessed by a governmental authority that is directly imposed on a revenue-producing transaction between us and a customer on a net basis in our Consolidated Income Statements.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| Income Taxes                                                                        | Income TaxesIncome taxes were computed using an effective tax rate, which is subject to ongoing review and evaluation.  Our effective tax rate for the three and six months ended June 30, 2014 is lower than the U.S. statutory rate due primarily to the inclusion of income attributable to the non-controlling interest in AWN in income before income tax expense and the exclusion of income taxes on income attributable to the non-controlling interest in AWN.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Reclassifications                                                                   | ReclassificationsReclassifications have been made to the 2013 financial statements to make them comparable with the 2014 presentation.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |

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