GOODWILL, BROADCAST LICENSES AND OTHER INTANGIBLE ASSETS: (Details 4) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2012
Amortized intangible assets:
Gross Carrying Amount	$ 2,320,526,000	$ 1,519,758,000
Accumulated Amortization	(502,263,000)	(392,003,000)
Net	1,818,263,000	1,127,755,000
Amortization expenses	125,496,000	70,820,000	38,099,000
Impairment charges for definite-lived intangibles	0	0	0
Estimated amortization expense of the definite-lived intangible assets
Net	1,818,263,000	1,127,755,000
Amortized intangible assets:
Amortized intangible assets:
Net	1,818,263,000
Weighted-average useful life subject to amortization acquired	14 years
Amortization expenses	125,500,000	70,800,000	38,100,000
Estimated amortization expense of the definite-lived intangible assets
For the year ended December 31, 2015	147,831,000
For the year ended December 31, 2016	146,877,000
For the year ended December 31, 2017	144,887,000
For the year ended December 31, 2018	143,923,000
For the year ended December 31, 2019	143,834,000
Thereafter	1,090,911,000
Net	1,818,263,000
Amortized intangible assets: | Minimum
Amortized intangible assets:
Amortization period	5 years
Amortized intangible assets: | Maximum
Amortized intangible assets:
Amortization period	25 years
Network affiliations
Amortized intangible assets:
Gross Carrying Amount	1,396,792,000	869,535,000
Accumulated Amortization	(257,526,000)	(195,037,000)
Net	1,139,266,000	674,498,000
Amortization period	15 years	15 years		15 years
Assets acquired in acquisition	506,800,000	321,000,000
Estimated amortization expense of the definite-lived intangible assets
Net	1,139,266,000	674,498,000
Decaying advertiser base
Amortized intangible assets:
Gross Carrying Amount	324,262,000	260,454,000
Accumulated Amortization	(148,878,000)	(135,978,000)
Net	175,384,000	124,476,000
Amortization period	10 years	10 years		10 years
Assets acquired in acquisition	69,000,000	80,000,000
Estimated amortization expense of the definite-lived intangible assets
Net	175,384,000	124,476,000
Other intangible assets
Amortized intangible assets:
Gross Carrying Amount	599,472,000	389,769,000
Accumulated Amortization	(95,859,000)	(60,988,000)
Net	503,613,000	328,781,000
Assets acquired in acquisition	214,200,000	155,500,000
Estimated amortization expense of the definite-lived intangible assets
Net	503,613,000	328,781,000
Other intangible assets | Minimum
Amortized intangible assets:
Weighted-average useful life subject to amortization acquired	14 years
Other intangible assets | Maximum
Amortized intangible assets:
Weighted-average useful life subject to amortization acquired	16 years
Alarm monitoring contract
Amortized intangible assets:
Assets acquired in acquisition	$ 27,700,000