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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Class of Stock [Line Items]        
Allocation of undistributed earnings for basic computation $ 8,155 $ 4,180 $ 10,276 $ 7,424
Common Stock - Class A [Member]
        
Class of Stock [Line Items]        
Allocation of undistributed earnings for basic computation 7,534 3,862 9,490 6,855
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares 621 318 786 569
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 (9) (60) (2) (94)
Net income adjusted for allocation of undistributed earnings and effect of share based compensation that may be settled in cash or shares 8,146 4,120 10,274 7,330
Number of shares used in basic computation 38,383 37,979 38,186 38,117
Conversion of Class B to Class A common shares outstanding 3,162 3,132 3,162 3,167
Unexercised stock options 122 164 121 168
Effect of share based compensation that may be settled in cash or shares 26 90 26 90
Number of shares used in per share computation 41,693 41,365 41,495 41,542
Diluted net income attributable to General Communication, Inc. common stockholders per common share (USD per share) $ 0.20 $ 0.10 $ 0.25 $ 0.18
Common Stock - Class B [Member]
        
Class of Stock [Line Items]        
Allocation of undistributed earnings for basic computation 621 318 786 569
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 (3) (6) (3) (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 $ 618 $ 312 $ 783 $ 559
Number of shares used in basic computation 3,162 3,132 3,163 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 3,132 3,163 3,167
Diluted net income attributable to General Communication, Inc. common stockholders per common share (USD per share) $ 0.20 $ 0.10 $ 0.25 $ 0.18