INTANGIBLE ASSETS, Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Amortizable Intangible Assets, Net [Abstract]
Gross carrying amount of amortizable intangible assets	$ 96,799,000	$ 127,999,000
Accumulated amortization	(60,018,000)	(78,047,000)
Amortizable intangible assets, net of accumulated amortization	36,781,000	49,952,000
Intangible Assets, Net [Abstract]
Amortizable intangible assets, net of accumulated amortization	36,781,000	49,952,000
Indefinite-lived cable television franchises	731,848,000	731,848,000
Trademarks and other indefinite-lived intangible assets	7,250,000	7,450,000
Goodwill	264,690,000	264,690,000
Total intangible assets, net	1,040,569,000	1,053,940,000
Aggregate amortization expense
Amortization expense, excluding impairment charges	8,220,000	12,790,000
Impairment charges	5,831,000	37,458,000
Estimated amortization expense
Year ending December 31, 2015	7,013,000
Year ending December 31, 2016	6,016,000
Year ending December 31, 2017	5,559,000
Year ending December 31, 2018	4,549,000
Year ending December 31, 2019	3,907,000
Customer relationships
Amortizable Intangible Assets, Net [Abstract]
Gross carrying amount of amortizable intangible assets	45,828,000	46,258,000
Accumulated amortization	(31,407,000)	(28,099,000)
Customer relationships | Minimum
Amortizable Intangible Assets, Net [Abstract]
Estimated useful lives	7 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	50,971,000	81,741,000
Accumulated amortization	$ (28,611,000)	$ (49,948,000)
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