Document and Entity Information	9 Months Ended
Sep. 30, 2013	Nov. 01, 2013 Class A Common Stock	Nov. 01, 2013 Class B Common Stock
Entity Listings
Entity Registrant Name	SINCLAIR BROADCAST GROUP INC
Entity Central Index Key	0000912752
Document Type	10-Q
Document Period End Date	Sep. 30, 2013
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		73,912,097	26,262,210
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3

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End date of current fiscal year in the format --MM-DD.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word "Other".

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

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