ACQUISITIONS (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended		0 Months Ended				3 Months Ended	6 Months Ended			0 Months Ended				12 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Fisher and Barrington Measurement period adjustments	Jun. 30, 2014 Fisher and Barrington Measurement period adjustments	Aug. 08, 2013 Fisher station market	Jun. 30, 2014 Fisher	Jun. 30, 2014 Fisher	Jun. 30, 2014 Fisher KIDK and KXPI station	Aug. 08, 2013 Fisher Network affiliations	Aug. 08, 2013 Fisher Decaying advertiser base	Aug. 08, 2013 Fisher Other intangible assets	Nov. 22, 2013 Barrington Broadcasting Company, LLC station market	Jun. 30, 2014 Barrington Broadcasting Company, LLC	Jun. 30, 2014 Barrington Broadcasting Company, LLC	Nov. 22, 2013 Barrington Broadcasting Company, LLC LMA	Nov. 22, 2013 Barrington Broadcasting Company, LLC Cunningham	Nov. 22, 2013 Barrington Broadcasting Company, LLC Network affiliations	Nov. 22, 2013 Barrington Broadcasting Company, LLC Decaying advertiser base	Nov. 22, 2013 Barrington Broadcasting Company, LLC Other intangible assets	May 31, 2013 CMG market station	Dec. 31, 2013 TTBG LLC market station	Jun. 30, 2014 Other acquisitions	Jun. 30, 2014 Other acquisitions	Dec. 31, 2013 Other acquisitions market station	Dec. 31, 2013 Other acquisitions Network affiliations	Dec. 31, 2013 Other acquisitions Decaying advertiser base	Dec. 31, 2013 Other acquisitions Other intangible assets
Acquisitions
Cash paid							$ 373,200,000							$ 370,000,000												$ 272,700,000
Cash paid for acquisition (in dollars per share)							$ 41.0
Number of television stations							22			2				24								5	10			19
Number of markets							8							15								4	4			10
Number of stations to which sales services were provided														5
Number of radio stations in Seattle market							4
Working capital adjustment														(2,400,000)												9,500,000
Noncontrolling interests related to the license assets														7,500,000												700,000
Price of assets acquired/sold										6,300,000							15,000,000	22,000,000
Gain or loss on sale of station																	3,300,000	0
Allocated fair value of acquired assets and assumed liabilities
Cash							13,531,000
Accounts receivable							29,962,000																			8,226,000
Prepaid expenses and other current assets							19,133,000							681,000												5,217,000
Program contract costs							11,427,000							3,960,000												6,182,000
Property and equipment					31,000,000	31,000,000	73,968,000							73,621,000												54,148,000
Deferred tax asset																										3,888,000
Broadcast licenses					22,000,000	22,000,000	30,977,000							2,948,000												3,736,000
Definite-lived intangible assets							166,378,000				117,500,000	18,100,000	30,800,000	217,818,000					101,000,000	42,000,000	74,800,000					147,191,000
Other assets							7,683,000
Assets held for sale							6,339,000
Accrued liabilities																										(3,926,000)
Accounts payable and accrued liabilities							(20,127,000)							(2,725,000)
Program contracts payable							(10,977,000)							(3,813,000)												(6,331,000)
Deferred tax liability					(24,000,000)	(24,000,000)	(74,877,000)
Other long-term liabilities							(22,127,000)							(65,000)												(10,300,000)
Fair value of identifiable net assets acquired							231,290,000							292,425,000												208,031,000
Goodwill						(37,000,000)	142,959,000							75,261,000												74,847,000
Depreciation expense	25,252,000	15,105,000	49,630,000	29,700,000	1,300,000
Amortization expense					1,500,000
Less: fair value of non-controlling interests							(1,053,000)
Total							373,196,000							367,686,000												282,878,000
Goodwill deductible for tax purposes							11,100,000
Amortization period											15 years	10 years							15 years	10 years							15 years	10 years
Weighted average life													14 years								15 years								14 years
Net broadcast revenues	404,151,000	279,270,000	778,032,000	532,195,000				45,100,000	84,300,000						41,300,000	80,400,000								23,800,000	54,600,000
Operating income								6,000,000	6,500,000						5,500,000	15,700,000								4,900,000	8,900,000
Pro Forma Information
Total revenues		390,544,000		741,649,000
Net Income		16,009,000		24,889,000
Net Income attributable to Sinclair Broadcast Group from continuing operations		$ 15,776,000		$ 24,783,000
Basic earnings per share attributable to Sinclair Broadcast Group from continuing operations (in dollars per share)		$ 0.12		$ 0.22
Diluted earnings per share attributable to Sinclair Broadcast Group from continuing operations (in dollars per share)		$ 0.11		$ 0.22