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v2.4.1.9

Supplemental Cash Flow Information (Details Textual) (USD $) | 1 Months Ended |
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May 31, 2013 | Dec. 31, 2014
Supplemental Cash Flow Information [Line Items] |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 120,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Revolving Credit Facility [Member] |  |
Supplemental Cash Flow Information [Line Items] |  |
Line of Credit Facility, Maximum Borrowing Capacity | 90,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Debt Instrument, Increase (Decrease), Net | 27,750,000 us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Term Loan [Member] |  |
Supplemental Cash Flow Information [Line Items] |  |
Line of Credit Facility, Maximum Borrowing Capacity | 30,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = sga_TermLoanMember | 30,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = sga_TermLoanMember
Debt Instrument, Increase (Decrease), Net | $ 27,750,000 us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet / us-gaap_LongtermDebtTypeAxis = sga_TermLoanMember |

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- Definition Net increase or decrease in the carrying amount of the debt instrument for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 + Details
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Balance Type: | credit
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Balance Type: | credit
Period Type: | instant

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