GOODWILL, BROADCAST LICENSES AND OTHER INTANGIBLE ASSETS: (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Amortized intangible assets:
Gross Carrying Amount	$ 701,295		$ 701,295		$ 473,518
Accumulated Amortization	(321,538)		(321,538)		(298,177)
Net	379,757		379,757		175,341
Amortization expenses	10,669	4,393	26,694	14,201
Reclassification of goodwill to assets held for sale			(4,721)
Purchase of additional alarm monitoring contracts			7,343	6,930
Estimated amortization expense of the definite-lived intangible assets
Net	379,757		379,757		175,341
Amortized intangible assets:
Amortized intangible assets:
Net	379,757		379,757
Amortization expenses			26,700	14,200
Estimated amortization expense of the definite-lived intangible assets
For the year ended December 31, 2013	40,979		40,979
For the year ended December 31, 2014	38,649		38,649
For the year ended December 31, 2015	38,339		38,339
For the year ended December 31, 2016	38,181		38,181
For the year ended December 31, 2017	37,942		37,942
Thereafter	185,667		185,667
Net	379,757		379,757
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	403,260		403,260		244,900
Accumulated Amortization	(154,462)		(154,462)		(141,202)
Net	248,798		248,798		103,698
Estimated amortization expense of the definite-lived intangible assets
Net	248,798		248,798		103,698
Network affiliations | WLAJ-TV
Amortized intangible assets:
Reclassification of amortizable intangible assets to assets held for sale			4,000
Network affiliations | Four Points and Freedom
Amortized intangible assets:
Assets acquired in acquisition			160,000
Decaying advertiser base
Amortized intangible assets:
Gross Carrying Amount	154,909		154,909		122,375
Accumulated Amortization	(120,307)		(120,307)		(115,897)
Net	34,602		34,602		6,478
Estimated amortization expense of the definite-lived intangible assets
Net	34,602		34,602		6,478
Decaying advertiser base | WLAJ-TV
Amortized intangible assets:
Reclassification of amortizable intangible assets to assets held for sale			300
Decaying advertiser base | Four Points and Freedom
Amortized intangible assets:
Assets acquired in acquisition			32,800
Other
Amortized intangible assets:
Gross Carrying Amount	143,126		143,126		106,243
Accumulated Amortization	(46,769)		(46,769)		(41,078)
Net	96,357		96,357		65,165
Purchase of additional alarm monitoring contracts			7,800
Estimated amortization expense of the definite-lived intangible assets
Net	96,357		96,357		65,165
Other | WLAJ-TV
Amortized intangible assets:
Reclassification of amortizable intangible assets to assets held for sale			900
Other | Four Points and Freedom
Amortized intangible assets:
Assets acquired in acquisition			$ 29,800