Document and Entity Information	3 Months Ended
	Mar. 31, 2015	May 04, 2015
Entity Listings
Entity Registrant Name	SINCLAIR BROADCAST GROUP INC
Entity Central Index Key	0000912752
Document Type	10-Q
Document Period End Date	Mar. 31, 2015
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Class A Common Stock
Entity Listings
Entity Common Stock, Shares Outstanding		69,518,193
Class B Common Stock
Entity Listings
Entity Common Stock, Shares Outstanding		25,928,357