Quarterly report pursuant to Section 13 or 15(d)

Business and Summary of Significant Accounting Principles (Basic EPS calculations) (Details)

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Business and Summary of Significant Accounting Principles (Basic EPS calculations) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Class of Stock [Line Items]        
Allocation of undistributed earnings $ 4,180 $ 3,982 $ 7,424 $ 5,411
Common Stock - Class A [Member]
       
Class of Stock [Line Items]        
Allocation of undistributed earnings 3,862 3,679 6,855 5,001
Weighted average common shares outstanding 37,979 38,516 38,117 38,629
Basic net income attributable to GCI common stockholders per common share $ 0.10 $ 0.10 $ 0.18 $ 0.13
Common Stock - Class B [Member]
       
Class of Stock [Line Items]        
Allocation of undistributed earnings $ 318 $ 303 $ 569 $ 410
Weighted average common shares outstanding 3,132 3,171 3,167 3,171
Basic net income attributable to GCI common stockholders per common share $ 0.10 $ 0.10 $ 0.18 $ 0.13