CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenues	$ 231,214	$ 236,655	$ 683,675	$ 701,519
Cost of goods sold (exclusive of depreciation and amortization shown separately below)	67,496	73,494	205,099	227,926
Selling, general and administrative expenses	90,691	88,974	280,478	264,642
Depreciation and amortization expense	48,853	47,819	147,547	143,033
Operating income	24,174	26,368	50,551	65,918
Other income (expense):
Interest expense (including amortization of deferred loan fees)	(21,595)	(19,666)	(62,377)	(58,199)
Other	(69)	613	1,203	1,702
Other expense, net	(21,664)	(19,053)	(61,174)	(56,497)
Income (loss) before income taxes	2,510	7,315	(10,623)	9,421
Income tax expense	(322)	(8,288)	(10,671)	(10,490)
Net income (loss)	2,188	(973)	(21,294)	(1,069)
Net loss attributable to non-controlling interests	(118)	(116)	(353)	(350)
Net income (loss) attributable to GCI, Inc.	$ 2,306	$ (857)	$ (20,941)	$ (719)