INTANGIBLE ASSETS, Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Amortizable Intangible Assets, Net [Abstract]
Gross carrying amount of amortizable intangible assets	$ 97,261	$ 96,799
Accumulated amortization	(60,310)	(60,018)
Amortizable intangible assets, net of accumulated amortization	36,951	36,781
Intangible Assets, Net [Abstract]
Indefinite-lived cable television franchises	731,848	731,848
Trademarks and other indefinite-lived intangible assets	7,250	7,250
Goodwill	262,345	264,690
Total intangible assets, net	1,038,394	1,040,569
Aggregate amortization expense
Amortization expense (excluding impairment charges $5,831 in 2014)	7,812	8,220
Impairment charges		5,831
Estimated amortization expense
Year ending December 31, 2016	6,968
Year ending December 31, 2017	6,510
Year ending December 31, 2018	5,502
Year ending December 31, 2019	4,860
Year ending December 31, 2020	3,923
Customer relationships
Amortizable Intangible Assets, Net [Abstract]
Gross carrying amount of amortizable intangible assets	39,414	45,828
Accumulated amortization	$ (27,778)	(31,407)
Customer relationships | Minimum
Amortizable Intangible Assets, Net [Abstract]
Estimated useful lives	10 years
Customer relationships | Maximum
Amortizable Intangible Assets, Net [Abstract]
Estimated useful lives	18 years
Other amortizable intangibles
Amortizable Intangible Assets, Net [Abstract]
Gross carrying amount of amortizable intangible assets	$ 57,847	50,971
Accumulated amortization	$ (32,532)	$ (28,611)
Other amortizable intangibles | Minimum
Amortizable Intangible Assets, Net [Abstract]
Estimated useful lives	3 years
Other amortizable intangibles | Maximum
Amortizable Intangible Assets, Net [Abstract]
Estimated useful lives	28 years