Long-Term Debt (Details Textual) (USD $) In Millions, unless otherwise specified
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12 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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May 31, 2013
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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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Excluded Distributions Under Credit Facility |
20sga_ExcludedDistributionsUnderCreditFacility |
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Additional Business Acquisitions Cost |
35sga_AdditionalBusinessAcquisitionsCost |
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Maximum [Member] |
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Debt Instrument [Line Items] |
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Consolidated Leverage Ratio |
2.50%sga_ConsolidatedLeverageRatio / us-gaap_RangeAxis = us-gaap_MaximumMember |
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Line of Credit Facility, Commitment Fee Percentage |
0.35%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_RangeAxis = us-gaap_MaximumMember |
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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] |
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Debt Instrument [Line Items] |
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Consolidated Leverage Ratio |
1.00%sga_ConsolidatedLeverageRatio / us-gaap_RangeAxis = us-gaap_MinimumMember |
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Line of Credit Facility, Commitment Fee Percentage |
0.25%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_RangeAxis = us-gaap_MinimumMember |
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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 |
0.16925%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = sga_LiborRateMember |
0.169%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = sga_LiborRateMember |
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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 |
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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 |
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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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30us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LongtermDebtTypeAxis = sga_TermLoanMember |
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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