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, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Class of Stock [Line Items]        
Allocation of undistributed earnings for basic computation $ 4,180 $ 3,982 $ 7,424 $ 5,411
Common Stock - Class A [Member]
       
Class of Stock [Line Items]        
Allocation of undistributed earnings for basic computation 3,862 3,679 6,855 5,001
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares 318 303 569 410
Effect of share based compensation that may be settled in cash or shares (60) (33) (94) (118)
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares outstanding 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 4,120 3,949 7,330 5,293
Number of shares used in basic computation 37,979 38,516 38,117 38,629
Conversion of Class B to Class A common shares outstanding 3,132 3,171 3,167 3,171
Unexercised stock options 164 304 168 272
Effect of share based compensation that may be settled in cash or shares 90 158 90 158
Number of shares used in per share computations 41,365 42,149 41,542 42,230
Diluted net income attributable to General Communication, Inc. common stockholders per common share $ 0.10 $ 0.09 $ 0.18 $ 0.13
Common Stock - Class B [Member]
       
Class of Stock [Line Items]        
Allocation of undistributed earnings for basic computation 318 303 569 410
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares 0 0 0 0
Effect of share based compensation that may be settled in cash or shares 0 0 0 0
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares outstanding (6) (4) (10) (10)
Net income adjusted for allocation of undistributed earnings and effect of share based compensation that may be settled in cash or shares $ 312 $ 299 $ 559 $ 400
Number of shares used in basic computation 3,132 3,171 3,167 3,171
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 computations 3,132 3,171 3,167 3,171
Diluted net income attributable to General Communication, Inc. common stockholders per common share $ 0.10 $ 0.09 $ 0.18 $ 0.13