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 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Class of Stock [Line Items]        
Allocation of undistributed earnings $ 3,700 $ 7,239 $ 9,111 $ 6,594
Common Stock - Class A [Member]
       
Class of Stock [Line Items]        
Allocation of undistributed earnings 3,419 6,728 8,420 6,140
Weighted average common shares outstanding 38,600 41,768 38,614 42,940
Basic net income attributable to GCI common stockholders per common share $ 0.09 $ 0.16 $ 0.22 $ 0.14
Common Stock - Class B [Member]
       
Class of Stock [Line Items]        
Allocation of undistributed earnings $ 281 $ 511 $ 691 $ 454
Weighted average common shares outstanding 3,170 3,175 3,170 3,177
Basic net income attributable to GCI common stockholders per common share $ 0.09 $ 0.16 $ 0.22 $ 0.14