Preferred Members' Interest - Additional Information (Detail) - Mediacom LLC [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jul. 31, 2001
Class Of Stock [Line Items]
Preferred equity investment				$ 150.0
Percentage of annual cash dividend on preferred equity investment	12.00%
Cash dividends on preferred membership interest	$ 18.0	$ 18.0	$ 18.0