Business and Summary of Significant Accounting Principles (Basic EPS calculations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Class of Stock [Line Items]
Allocation of undistributed earnings	$ 2,121	$ 3,244
Common Stock - Class A [Member]
Class of Stock [Line Items]
Allocation of undistributed earnings	1,958	2,996
Weighted average common shares outstanding	37,987	38,264
Basic net income attributable to GCI common stockholders per common share (USD per share)	$ 0.05	$ 0.08
Common Stock - Class B [Member]
Class of Stock [Line Items]
Allocation of undistributed earnings	$ 163	$ 248
Weighted average common shares outstanding	3,163	3,167
Basic net income attributable to GCI common stockholders per common share (USD per share)	$ 0.05	$ 0.08