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Discontinued Operations (Details Textual) (USD $) | 0 Months Ended | 1 Months Ended
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Apr. 03, 2012 | Jan. 31, 2013
Discontinued Operations [Abstract] |  |
Recognized gain on net of tax |  | $ 223,000 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Discontinued Operation Selling Price | $ 3,000,000 sga_DiscontinuedOperationSellingPrice |

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- Definition Selling price for TV station reported as discontinued. + References No definition available. + Details
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- Definition Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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