2.4.0.8300500 - Disclosure - Intangible Assets and Goodwill (Tables)truefalsefalse1false falsefalseFROM_Jan01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000075679duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Intangible Assets [Abstract]2false 2gciinc_ScheduleOfAmortizationExpenseTableTextBlockgciinc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 17px"><td style="width: 15px; text-align:left;border-color:#000000;min-width:15px;">&#160;</td><td style="width: 316px; text-align:left;border-color:#000000;min-width:316px;">&#160;</td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;">&#160;</td><td colspan="3" style="width: 150px; text-align:center;border-color:#000000;min-width:150px;"><font style="FONT-FAMILY: Arial;FONT-SIZE: 10pt;COLOR: #000000;TEXT-ALIGN: center;">Three Months Ended June 30,</font></td><td style="width: 10px; 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