Quarterly report pursuant to Section 13 or 15(d)

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

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Business and Summary of Significant Accounting Principles (Diluted 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 for basic computation $ 12,512 $ 8,905 $ 22,788 $ 16,329
Common Stock - Class A [Member]
        
Class of Stock [Line Items]        
Allocation of undistributed earnings for basic computation 11,561 8,211 21,049 15,070
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares (951) (694) (1,739) (1,259)
Reallocation of undistributed earnings as a result of conversion of dilutive securities 0 0 0 0
Effect of share based compensation that may be settled in cash or shares (4) 0 (7) (26)
Net income adjusted for allocation of undistributed earnings and effect of share based compensation that may be settled in cash or shares 12,508 8,905 22,781 16,303
Number of shares used in basic computation 38,425 37,434 38,266 37,887
Conversion of Class B to Class A common shares outstanding 3,162 3,166 3,162 3,167
Unexercised stock options 121 176 121 175
Effect of share based compensation that may be settled in cash or shares 26 0 26 90
Number of shares used in per share computation 41,734 40,776 41,575 41,319
Diluted net income attributable to General Communication, Inc. common stockholders per common share (USD per share) $ 0.30 $ 0.22 $ 0.55 $ 0.39
Common Stock - Class B [Member]
        
Class of Stock [Line Items]        
Allocation of undistributed earnings for basic computation 951 694 1,739 1,259
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares 0 0 0 0
Reallocation of undistributed earnings as a result of conversion of dilutive securities (4) 6 (7) (10)
Effect of share based compensation that may be settled in cash or shares 0 0 0 0
Net income adjusted for allocation of undistributed earnings and effect of share based compensation that may be settled in cash or shares $ 947 $ 700 $ 1,732 $ 1,249
Number of shares used in basic computation 3,162 3,166 3,162 3,167
Conversion of Class B to Class A common shares outstanding 0 0 0 0
Unexercised stock options 0 0 0 0
Effect of share based compensation that may be settled in cash or shares 0 0 0 0
Number of shares used in per share computation 3,162 3,166 3,162 3,167
Diluted net income attributable to General Communication, Inc. common stockholders per common share (USD per share) $ 0.30 $ 0.22 $ 0.55 $ 0.39