SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details 3) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Variable Interest Entities
Income from equity and cost method investments	$ 1,928,000	$ 1,571,000	$ 2,768,000	$ 115,000
VIEs which are not primary beneficiary
Variable Interest Entities
Carrying amount	24,200,000		24,200,000		26,700,000
Income from equity and cost method investments	$ 2,200,000	$ 700,000	$ 3,100,000	$ 1,400,000

This element includes the gain or loss from both equity and cost method investments. The Income (Loss) from Equity Method Investments represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment. The Income (Loss) from Cost Method Investments represents the income realized during the period due to distributions from investments treated as returns on the investment and included as a part of the cumulative earnings of the investment and any losses recognized thereon for impairments of other than a temporary nature.

No definition available.

Name:	sbgi_GainLossOnEquityAndCostMethodInvestments
Namespace Prefix:	sbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration