Quarterly report pursuant to Section 13 or 15(d)

Earnings (Loss) per Common Share (Diluted Net Income (Loss) Per Share) (Details)

v3.7.0.1
Earnings (Loss) per Common Share (Diluted Net Income (Loss) Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Common Stock - Class A [Member]        
Numerator:        
Undistributed net income (loss) allocable to common stockholders for basic computation $ (8,086) $ 2,967 $ (58,207) $ 3,934
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares (796) 281 (5,804) 370
Reallocation of undistributed earnings as a result of conversion of dilutive securities 0 189 0 304
Effect of derivative instrument that may be settled in cash or shares 0 (3,834) 0 (6,501)
Effect of share based compensation that may be settled in cash or shares 0 (39) 0 (62)
Undistributed net loss adjusted for allocation of undistributed earnings (loss) and effect of contracts that may be settled in cash or shares $ (8,882) $ (436) $ (64,011) $ (1,955)
Denominator:        
Number of shares used in basic computation 31,276 33,308 31,248 33,502
Conversion of Class B to Class A common shares outstanding 3,078 3,155 3,116 3,155
Effect of derivative instrument that may be settled in cash or shares 0 611 0 744
Effect of share based compensation that may be settled in cash or shares 0 26 0 26
Number of shares used in per share computation 34,354 37,100 34,364 37,427
Diluted net loss attributable to GCI common stockholders per common share (USD per share) $ (0.26) $ (0.01) $ (1.86) $ (0.05)
Common Stock - Class B [Member]        
Numerator:        
Undistributed net income (loss) allocable to common stockholders for basic computation $ (796) $ 281 $ (5,804) $ 370
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 0 (319) 0 (536)
Effect of derivative instrument that may be settled in cash or shares 0 0 0 0
Effect of share based compensation that may be settled in cash or shares 0 0 0 0
Undistributed net loss adjusted for allocation of undistributed earnings (loss) and effect of contracts that may be settled in cash or shares $ (796) $ (38) $ (5,804) $ (166)
Denominator:        
Number of shares used in basic computation 3,078 3,155 3,116 3,155
Conversion of Class B to Class A common shares outstanding 0 0 0 0
Effect of derivative instrument that may be settled in cash or shares 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 3,078 3,155 3,116 3,155
Diluted net loss attributable to GCI common stockholders per common share (USD per share) $ (0.26) $ (0.01) $ (1.86) $ (0.05)