Long-Term Debt (Details Textual) (USD $) In Millions, unless otherwise specified
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3 Months Ended |
12 Months Ended |
Mar. 31, 2015
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Dec. 31, 2014
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Debt Instrument [Line Items] |
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Credit Facility maximum borrowing capacity |
120us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity |
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Credit facility matures |
May 31, 2018 |
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Secured Debt |
1.1us-gaap_SecuredDebt |
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Debt Instrument, Maturity Date |
May 01, 2017 |
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Term Loan Maturity Period |
3 years |
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Maximum [Member] | Base Rate [Member] |
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Debt Instrument [Line Items] |
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Debt Instrument, Basis Spread on Variable Rate |
1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |
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Minimum [Member] | Base Rate [Member] |
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Debt Instrument [Line Items] |
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Debt Instrument, Basis Spread on Variable Rate |
0.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |
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Libor Rate [Member] |
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Debt Instrument [Line Items] |
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Debt Instrument, Interest Rate, Effective Percentage |
0.178%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = sga_LiborRateMember |
0.16925%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = sga_LiborRateMember |
Libor Rate [Member] | Maximum [Member] |
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Debt Instrument [Line Items] |
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Debt Instrument, Basis Spread on Variable Rate |
2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = sga_LiborRateMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = sga_LiborRateMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Libor Rate [Member] | Minimum [Member] |
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Debt Instrument [Line Items] |
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Debt Instrument, Basis Spread on Variable Rate |
1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = sga_LiborRateMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = sga_LiborRateMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Term loan [Member] |
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Debt Instrument [Line Items] |
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Credit Facility maximum borrowing capacity |
30us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = sga_TermLoanMember |
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Term loan principal amortization rate |
5.00%sga_TermLoanPrincipalAmortizationRate / us-gaap_LongtermDebtTypeAxis = sga_TermLoanMember |
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Revolving credit facility [Member] |
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Debt Instrument [Line Items] |
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Credit Facility maximum borrowing capacity |
90us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |
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Unused borrowing capacity under the revolving credit Facility |
85us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember |
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Revolving credit facility [Member] | Maximum [Member] |
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Debt Instrument [Line Items] |
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Debt Instrument, Basis Spread on Variable Rate |
0.35%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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Revolving credit facility [Member] | Minimum [Member] |
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Debt Instrument [Line Items] |
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Debt Instrument, Basis Spread on Variable Rate |
0.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
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