CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Shares of Class A Common Stock [Member]	Paid-in Capital [Member]	Retained Deficit [Member]	Non-controlling Interests [Member]	Common Stock - Class A [Member]
Beginning balances, common stock, shares issued at Dec. 31, 2015		100.0
Beginning balances, total stockholders' equity at Dec. 31, 2015	$ 210,095		$ 164,508	$ (192,033)	$ 30,998	$ 206,622
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	326			443	(117)
Distribution to General Communication, Inc.	(17,176)			(17,176)
Contribution from General Communication, Inc.	2,430		2,430
Ending balances, common stock, shares issued at Mar. 31, 2016		100.0
Ending balances, total stockholders' equity at Mar. 31, 2016	195,675		166,938	(208,766)	30,881	$ 206,622
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of ASU 2016-09 adoption	7,095		18	7,077
Beginning balances, common stock, shares issued at Dec. 31, 2016		100.0				100.0
Beginning balances, total stockholders' equity at Dec. 31, 2016	140,917		161,310	(257,544)	30,529	$ 206,622
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,999			2,116	(117)
Distribution to General Communication, Inc.	(11,198)			(11,198)
Contribution from General Communication, Inc.	3,103		3,103
Investment by non-controlling interest	2,709				2,709
Ending balances, common stock, shares issued at Mar. 31, 2017		100.0				100.0
Ending balances, total stockholders' equity at Mar. 31, 2017	$ 144,625		$ 164,431	$ (259,549)	$ 33,121	$ 206,622