Quarterly report pursuant to Section 13 or 15(d)

Earnings (Loss) per Common Share (Basic Net Income (Loss) per Share) (Details)

v3.8.0.1
Earnings (Loss) per Common Share (Basic Net Income (Loss) per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Numerator:        
Net income (loss) available to common stockholders $ (8,731) $ 7,943 $ (72,742) $ 12,457
Class A        
Numerator:        
Net income (loss) available to common stockholders (7,957) 7,266 (66,197) 11,422
Less: Undistributed net income allocable to participating securities 0 (386) 0 (588)
Undistributed net income (loss) allocable to common stockholders $ (7,957) $ 6,880 $ (66,197) $ 10,834
Denominator:        
Weighted average common shares outstanding 31,374 32,033 31,291 33,008
Basic net income (loss) attributable to GCI common stockholders per common share (USD per share) $ (0.25) $ 0.21 $ (2.12) $ 0.33
Class B        
Numerator:        
Net income (loss) available to common stockholders $ (774) $ 677 $ (6,545) $ 1,035
Less: Undistributed net income allocable to participating securities 0 0 0 0
Undistributed net income (loss) allocable to common stockholders $ (774) $ 677 $ (6,545) $ 1,035
Denominator:        
Weighted average common shares outstanding 3,052 3,154 3,094 3,154
Basic net income (loss) attributable to GCI common stockholders per common share (USD per share) $ (0.25) $ 0.21 $ (2.12) $ 0.33