Represents the Increase in Borrowing Capacity on a Line of Credit Facility.

No definition available.

Name:	gtn_LineOfCreditFacilityIncreaseInMaximumBorrowingCapacity
Namespace Prefix:	gtn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Purchase price of expected business acquisition prior to consideration being transferred. Excludes asset acquisition.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=gtn_Notes2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gtn_The2021TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gtn_The2024TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=gtn_FifthAmendmentIncreasingAggregateCommitmentsTo750MillionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gtn_Notes2032Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gtn_Notes2033Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=gtn_SghMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=gtn_BlockCommunicationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=gtn_AmgMember
Namespace Prefix:
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Period Type:

Note 13 - Subsequent Events (Details Textual) - USD ($) $ in Millions						6 Months Ended
	Aug. 08, 2025	Aug. 01, 2025	Jul. 31, 2025	Jul. 25, 2025	Jul. 18, 2025	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Repayments of Long-Term Debt						$ 168	$ 2,015
Line of Credit Facility, Maximum Borrowing Capacity						$ 700		$ 680
2027 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage						7.00%		7.00%
The 2021 Term Loan [Member]
Debt Instrument, Interest Rate, Stated Percentage						7.40%
The 2024 Term Loan [Member]
Debt Instrument, Interest Rate, Stated Percentage						9.60%
Subsequent Event [Member] \| Revolving Credit Facility [Member]
Proceeds from Lines of Credit					$ 50
Repayments of Long-Term Debt				$ 50
Subsequent Event [Member] \| Fifth Amendment Increasing Aggregate Commitments to 750 Million [Member]
Line of Credit Facility, Increase in Maximum Borrowing Capacity					50
Line of Credit Facility, Maximum Borrowing Capacity					750
Subsequent Event [Member] \| Notes 2032 [Member]
Debt Instrument, Face Amount					$ 900
Debt Instrument, Interest Rate, Stated Percentage					9.625%
Subsequent Event [Member] \| 2027 Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage					7.00%
Debt Instrument, Repurchase Amount					$ 528
Subsequent Event [Member] \| 2024 Notes [Member]
Repayments of Long-Term Debt					$ 403
Subsequent Event [Member] \| 2033 Notes [Member]
Debt Instrument, Face Amount				$ 775
Debt Instrument, Interest Rate, Stated Percentage				7.25%
Subsequent Event [Member] \| The 2021 Term Loan [Member]
Repayments of Long-Term Debt				$ 630
Subsequent Event [Member] \| The 2024 Term Loan [Member]
Repayments of Long-Term Debt				$ 80
Subsequent Event [Member] \| SGH [Member] \| Maximum [Member]
Business Combination, Price of Acquisition, Expected			$ 2
Subsequent Event [Member] \| Block Communications [Member]
Business Combination, Price of Acquisition, Expected		$ 80
Subsequent Event [Member] \| AMG [Member]
Business Combination, Price of Acquisition, Expected	$ 171