Represents the amount by which the purchase price will be reduced by from quarterly installments.

No definition available.

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- Definition

Represents the annual percentage increase in aggregate purchase price of the television stations.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

Represents the amount of remaining purchase price, difference of aggregate purchase price and total payments made in pursuant to the business acquisition.

+ References

No definition available.

+ Details

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- Definition

Represents the renewal period of agreements by related parties.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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- Definition

Represents the amount paid by related party to the other related party pursuant to agreement.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Represents the amount used to determine annual LMA fees required to be paid to related party.

+ References

No definition available.

+ Details

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- Definition

Represents the number of renewal periods of agreements by related parties.

+ References

No definition available.

+ Details

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Namespace Prefix:	sbgi_
Data Type:	xbrli:integerItemType
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- Definition

Represents the number of real estate ventures.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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- Definition

Represents the number of restaurants owned by related parties.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Represents the number of stations to which programming, sales and managerial services were provided by the entity in related party transaction.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of operating costs reimbursed to the related party.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

Represents the amount paid for transactions to related party during the financial reporting period.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of each station's net broadcast revenue due to the related party used to determine amount of annual LMA fees required to be paid.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

Percentage of capital stock or assets to be acquired in business combination.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

The cash outflow to reacquire common and preferred stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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Balance Type:	credit
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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

The value of all consideration given or received by the Entity in the significant acquisition or disposal.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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RELATED PERSON TRANSACTIONS (Details) $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended
RELATED PERSON TRANSACTIONS (Details) $ in Thousands	Jul. 31, 2014 USD ($)	Jun. 30, 2015 USD ($) restaurant item	Jun. 30, 2014 USD ($)	Mar. 31, 2013 USD ($)	Jun. 30, 2015 USD ($) restaurant item	Jun. 30, 2014 USD ($)	Sep. 30, 2014	Aug. 01, 2014 USD ($)	Dec. 31, 2012 USD ($)	Nov. 05, 2009 USD ($)
Related person transactions
Revenue		$ 554,167	$ 455,136		$ 1,058,942	$ 867,784
Entities owned by the controlling shareholders \| Leased assets or facilities
Related person transactions
Amount paid		1,200	1,300		2,600	2,800
Controlling shareholders \| Maximum \| Charter Aircraft
Related person transactions
Aircraft expense		$ 300	300		$ 600	600
Cunningham
Related person transactions
Right to acquire capital stock (as a percent)							100.00%
Price of assets sold										$ 78,500
Price for which nonvoting stock was purchased			2,000	$ 1,700
Annual increase in aggregate purchase price (as a percent)		6.00%			6.00%
Remaining purchase price		$ 53,600			$ 53,600
Revenue		24,100	29,200		45,900	56,400
Cunningham \| LMA
Related person transactions
Right to acquire capital stock (as a percent)							100.00%
Amount paid	$ 4,700	$ 2,100	2,100		$ 4,400	5,400
Price of assets sold								$ 14,000
Number of stations to which programming, sales and managerial services were provided by the entity \| item					6
Number of additional renewal terms \| item					3
Agreement renewal period					5 years
Operating costs reimbursement (as a percent)		100.00%			100.00%
Cunningham \| Minimum \| LMA
Related person transactions
Percentage of net broadcast revenue used to determine annual LMA fees required to be paid		3.00%			3.00%
Amount used to determine annual LMA fees required to be paid		$ 5,000			$ 5,000
Cunningham \| Maximum
Related person transactions
Amount of purchase price reduction from quarterly installments									$ 29,100
Cunningham license related assets
Related person transactions
Agreement renewal period					8 years
Amount of guarantee on the bank debt		2,900			$ 2,900
Revenue		1,900	1,900		3,700	3,400
Amount received		1,000	1,100		2,200	1,900
Atlantic Automotive \| Leased assets or facilities
Related person transactions
Annual rent		$ 300	300		$ 600	500
Number of real estate ventures \| item		1			1
Atlantic Automotive \| Maximum \| Advertising time
Related person transactions
Amount received		$ 100	100		$ 200	100
President and Chief Executive Officer \| Leased assets or facilities \| Real estate ventures in Baltimore, MD
Related person transactions
Number of restaurants owned by a related party \| restaurant		3			3
Number of real estate ventures \| item		1			1
President and Chief Executive Officer \| Leased assets or facilities \| Real estate ventures in Towson, MD
Related person transactions
Annual rent		$ 100	100		$ 100	100
Number of restaurants owned by a related party \| restaurant		1			1
Number of real estate ventures \| item		1			1
President and Chief Executive Officer \| Maximum \| Leased assets or facilities \| Real estate ventures in Baltimore, MD
Related person transactions
Amount received		$ 200	$ 100		$ 300	$ 200