Schedule H, line 4i-Schedule of Assets (Held at End of Year) (Details) - Employees' 401(k) Savings and Investment Plan	12 Months Ended
Dec. 31, 2025 USD ($)
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
Entity tax identification number	38-3042953
Plan number	001
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Participant loans receivable	$ 308,976
Total investments	$ 47,818,110
Minimum
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
Interest rates on Participant loans receivable	4.25%
Maximum
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
Interest rates on Participant loans receivable	9.50%
Investment, Identifier [Axis]: Allspring Special Mid Cap Value A Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:AllspringSpecialMidCapValueaFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 1,108,563
Investment, Identifier [Axis]: American Funds New Work R2 Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:AmericanFundsNewWorkR2FundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 724,874
Investment, Identifier [Axis]: Cohen & Steers Realty Shares Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:CohenAndSteersRealtySharesFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 27,587
Investment, Identifier [Axis]: Fidelity 500 Index Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:Fidelity500IndexFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 3,889,373
Investment, Identifier [Axis]: Fidelity Advisor Small Cap Value I Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:FidelityAdvisorSmallCapValueIFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 993,276
Investment, Identifier [Axis]: Fidelity Advisor Total Bond I Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:FidelityAdvisorTotalBondIFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 2,888,532
Investment, Identifier [Axis]: Fidelity International Index Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:FidelityInternationalIndexFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 2,427,185
Investment, Identifier [Axis]: Fidelity Mid Cap Index Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:FidelityMidCapIndexFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 1,474,848
Investment, Identifier [Axis]: Fidelity Small Cap Index Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:FidelitySmallCapIndexFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 1,148,629
Investment, Identifier [Axis]: Fidelity US Bond Index Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:FidelityUsBondIndexFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 2,129,017
Investment, Identifier [Axis]: JP Morgan Large Cap Growth R6 Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:JpMorganLargeCapGrowthR6FundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 4,423,288
Investment, Identifier [Axis]: MFS International Diversification R3 Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:MfsInternationalDiversificationR3FundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 3,533,780
Investment, Identifier [Axis]: Principal Fixed Income Guaranteed Option, Investment Contract
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:PrincipalFixedIncomeGuaranteedOptionMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	sga:EmployeeBenefitPlanGuaranteedIncomeFundMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 11,424,075
Investment, Identifier [Axis]: Putnam Small Cap Growth A Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:PutnamSmallCapGrowthaFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 821,958
Investment, Identifier [Axis]: Saga Communications, Inc, Common Stock
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:SagaCommunicationsIncMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	EBP, Employer, Common Stock [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 1,957,750
Investment, Identifier [Axis]: T. Rowe Price Diversified Mid-Cap Growth Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:TRowePriceDiversifiedMidCapGrowthFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 1,054,709
Investment, Identifier [Axis]: Thornburg Strategic Income T6 Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:ThornburgStrategicIncomeT6FundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 3,087,345
Investment, Identifier [Axis]: Vanguard Equity Income Admiral Fund, Mutual Fund
Schedule H, line 4i-Schedule of Assets (Held at End of Year)
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
EBP, Investment, Issuer Name [Extensible Enumeration]	sga:VanguardEquityIncomeAdmiralFundMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 4,394,345

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2

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- Definition

Amount of total assets in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, current value of investment, participant loan, and plan interest in master trust.

+ References

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- Definition

Current value of investment, excluding plan interest in master trust, in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract.

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- Definition

Indicates status of participation by participant for investment, excluding plan interest in master trust, in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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- Definition

Amount, after deemed distribution, of participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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- Definition

Indicates (true false) whether asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) was transacted with party-in-interest.

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- Definition

Indicates name of issuer of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(A)
-Publisher DOL-EBSA

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
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-Publisher DOL-EBSA

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 6
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-Publisher DOL-EBSA

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- Definition

Indicates type of investment at current value held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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- Definition

Interest rate on participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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- Definition

Plan number of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), in three-digit numeric format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-Number 2520
-Section 103
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(B)
-Publisher DOL-EBSA

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