CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Common Stock - Class A [Member]
Common stock outstanding (shares)					100
Beginning balances, total stockholders' equity at Dec. 31, 2013	$ 457,354	$ 79,297	$ (128,775)	$ 300,210	$ 206,622
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	53,448		16,982	36,466
Distribution to General Communication, Inc.	(1,972)		(1,972)
Contribution from General Communication, Inc.	7,190	7,190
Distribution to non-controlling interest	(37,500)			(37,500)
Adjustment to investment by non-controlling interest	(2,131)			(2,131)
Other	100			100
Ending balances, total stockholders' equity at Sep. 30, 2014	476,489	86,487	(113,765)	297,145	$ 206,622
Common stock outstanding (shares)					100
Common stock outstanding (shares)					100
Beginning balances, total stockholders' equity at Dec. 31, 2014	467,222	88,802	(128,068)	299,866	$ 206,622
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(12,620)		(12,950)	330
Distribution to General Communication, Inc.	(49,360)		(49,360)
Contribution from General Communication, Inc.	83,277	83,277
Distribution to non-controlling interest	(765)			(765)
Non-controlling interest acquisition	(303,831)	(35,467)		(268,364)
Other	(230)	(230)
Ending balances, total stockholders' equity at Sep. 30, 2015	$ 183,693	$ 136,382	$ (190,378)	$ 31,067	$ 206,622
Common stock outstanding (shares)					100