Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
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, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Class of Stock [Line Items]        
Allocation of undistributed earnings $ 12,512 $ 8,905 $ 22,788 $ 16,329
Common Stock - Class A [Member]
       
Class of Stock [Line Items]        
Allocation of undistributed earnings 11,561 8,211 21,049 15,070
Weighted average common shares outstanding 38,425 37,434 38,266 37,887
Basic net income attributable to GCI common stockholders per common share (USD per share) $ 0.30 $ 0.22 $ 0.55 $ 0.40
Common Stock - Class B [Member]
       
Class of Stock [Line Items]        
Allocation of undistributed earnings $ 951 $ 694 $ 1,739 $ 1,259
Weighted average common shares outstanding 3,162 3,166 3,162 3,167
Basic net income attributable to GCI common stockholders per common share (USD per share) $ 0.30 $ 0.22 $ 0.55 $ 0.40